"My eyelight is a forced opening from the void," Sans said, trying to keep his bones from rattling anymore. "I'm the experiment."

Their expressions clearly detailed just how caught off guard they were, no one expecting for Sans to be an experiment. Jeff's already wide eyes became wider, Ben's jaw dropped, and Sally confusingly asked what an experiment was. Slender was the only one from the group who didn't react, but he already knew the information being presented, it didn't affect him.

"An experiment is... I'm not sure exactly how to put it," Jane said.

"It's a test on scientific belief on certain elements of our world, to get more knowledge," Helen said, pushing his bloody mask to the side. "It means that scientists do things to test things out. Like mixing blood types together to see how they react, or catching a certain chemical on fire to test how long it can burn."

"Sometimes they can even test on people," Sans said, "Or test to create people."

"No way..." Ben hissed, grinning widely.

"Yeah, I was created from a Doctor's DNA," Sans groaned, "My soul was made from magic, so technically I wasn't born from anyone. I was created in a lab, and so was Papyrus."

"I don't know what that means, but congratulations anyway! Have a potato!" Laughing Jack said, handing Sans a random, uncooked, plain potato from who knows where.

"Uh, I think I have another good example for this," Sans said, holding out the potato for everyone to see. "I mean, humans have been using experiments to try to recreate plants as well. So think about it as this potato. Instead of it naturally growing out of the ground from being planted, instead Laughing Jack had created it by himself without it growing in the soil and it being watered and cared for. Instead of this potato being naturally born, it was recreated by Laughing here. That's what I am, compared to other monsters and humans. Other monsters had grown as souls before they got their bodies from two parents, but my soul was artificially created without any parents."

"Oh, that surprisingly was a good example," Tim said.

"I'm great at examples, shush," Sans told him, "I'm not exactly sure how the Doc managed to create me, I just know that I lived in a lab growing up. It's kinda why I have a forced opening with the void in my eye socket, it's because I was experimented on. Against my will, may I add. It's why Frisk told you guys at the carnival that I killed someone..."

"You..." Hoodie asked.

"Killed the guy, then dumped his remains into the core," Sans told them, "I did some stabby stabby, then some 'dispose of the evidence'-y."

"No, I like you as not a CreepyPasta!" Sally whined, throwing herself at Sans for a hug. "Don't do stabby stabby, bad Sans!"

"I usually like killer stuff, but I have to agree, if you become like us," Jeff said, looking over at Sans, "Then you have to go through what we've gone through. And I'd prefer if you stayed more you-ish."

"I mean, I want to stay me too," Sans said, hugging back Sally while giving her the potato Laughing Jack gave him. "It was more of self defense than anything. He was hurting me a lot during the experiments, I had no say in them. The Doc tied me down during most of them, and trust me, I was screaming a lot. Passed out a couple of times. The void is really powerful, but there's a reason why all of the monsters and humans just don't access the void. It requires a lot of technology and it hurts like h*ll, not to mention not everyone's souls can really handle it. I could because I was created to be strong and I was still young, I don't think anyone else could do it and survive. Even if they could, they wouldn't get away as good mentally as I did."

"You're a little bloody potato now," Laughing said.

"So you killed him and took off with Papyrus?" Eyeless Jack asked.

"Pretty much, yeah," Sans said, "But I couldn't get rid of the void, so it's just kinda... stuck with me. It did make me kinda powerful, though."

"Whacha mean?" Ben asked.

"I think it means he's stronger than other monsters because of the void, judging by how he accidentally summoned too many bones," Smile Dog said.

"It does mean he's stronger," Flowey said, sticking his head out from under the couch. "Like, insanely powerful."

"Didn't you guys wonder exactly how I got home after Hoodie led me away?" Sans asked, "Or Jane, how I was able to catch your knife after you threw it? It's because I'm pretty strong, from the experiments. And it's also why I'm really smart, since I was raised in a lab and had nothing else to do. And I'm connected to the void in a way, so I just understand it."

"You threw a knife at Sans?" Jeff asked.

"Hey, Laughing Jack kidnapped Sans into his own world filled with dead bodies, how come we aren't yelling at him?" Jane asked.

"How did you catch a knife midair?" Ben asked Sans excitedly.

"It just happens," Sans said, shrugging. "I didn't even really mean to. Reflexes."

"Sans has some wonky abilities, trust me, he's kicked by butt plenty of times," Flowey said.

"I guess I should tell you all about the resets now, since it ties into the void and how I know Flowey," Sans said, "So, uh, this might be really hard to explain... but basically you guys know how monsters were sealed underground, right? When that happened, we were trapped by human mages who used the power of their souls to create the barrier. When that happened, the barrier was created to separate us from them, and it somewhat used the power of the void to sort of place us in an alternate space, kind of? Instead of us existing in the current world, they had managed to use the void itself as a barrier. That's why humans could only enter through the one hole that connected the underground to the surface, because it was the only part of the two that wasn't separated by the void. And it was why we needed the power of seven souls instead of just digging to the surface, because we needed that determination and power to rip the void from around us. It's sort of like the humans laying a blanket over the entire mountain that couldn't be penetrated from the inside, and that there was just one small hole in it where Frisk had fallen in."

"Wait, if i-i-it was the void, couldn't you g-g-g-guys have went through it o-or something?" Toby asked.

"It was using the void power to act as a barrier, but that doesn't mean that we could just whip it away," Sans said, "I mean, it was unstable for awhile after it was created, so Slender could pass through, but afterwards it finalized and no one could pass through it, the barrier was too strong at that point. It's really hard to explain, but the void is like that, hard to understand. Uh, let's see... it's kinda like me and other monsters magical attacks. Just because both me and Toriel can use healing magic doesn't mean that she can take control of mine after I've used it, or reverse my healing on someone. I used it, so I did it. Or a better example could be a bone attack. If I summon it, no one else can take control of it since it's my magic. And in order to destroy it, you would need enough magic or force to destroy it. Since the void is made of power and magic, that means we couldn't just punch it enough to destroy it, we would need the equal amount of magic used in the barrier to destroy it. Which was why we needed the seven human souls, and it was why I couldn't just whisk my way through the barrier like it was a sheet of paper. Just because something is from the void doesn't mean that I have control over it. I can sense it, since I could sense the barrier was destroyed, and it's how Slender was able to sense the void from my eye socket. We're connected to the void but we don't have almighty power of it. Does that make some sense?"

"To sum up, we can sometimes sense it, but we can't control all of it," Slender said.

"Oh, o-okie dokie," Toby said, his body jerking suddenly.

"What does the barrier have to do with this, though?" Ben asked.

"Knowledge," Jeff said, wiggling his fingers at the Link look alike.

"As if you have any of that," Jane snorted.

"Well, because the underground was surrounded by the barrier, it was separated from the rest of the world," Sans said, "And since it was surrounded by the void... well, that meant that if someone's soul was determined enough, they could have the power to go back in time."

"What do you mean?" Hoodie asked.

"A reset." Sans sighed, feeling the void continue to drip from his eye socket, "It's called a reset."

《》《》《》

Holy crap this is going to take ages for Sans to explain his full past because it's SO COMPLICATED!

WHY IS THE VOID SO COMPLICATED?

WHY DID I MAKE IT THAT WAY?

Eh, it's a cool tie in between CreepyPasta and Undertale, whatever. But the next chapter will hopefully be the last one about Sans explaining his past, since I have to write mountains of dialogue for these chapters so I can't make them too long because of how much information is in them.

Yeah, the void is really complicated, I'm trying guys.