This was suggested by bobthelemon, and modified by me. I took the general idea of his/hers suggestion and changed it slightly. There is still Flowey in it, but Jack dose NOT turn INTO Flowey.                                                                                 

                                                                         ~Third Person View~

Unnoticed to everyone else, another pair of eyes watched the scene. To the shock of everyone, high-pitched, slightly hysterical, laughter filled the air. Chara stood up and looked around, confused.

 "You IDIOTS!"

"Well you were having your little POW WOW, I took the HUMAN SOULS!"

A small flower popped out of the Earth, several feet away from Frisk/Chara and Jack. Six small multicolored hearts floated around the flower. Frisk let out a gasp.

"Flowey!" she said, surprised.

Flowey giggled.

"I have a problem though." Flowey said. A vine shot out of the Earth, lifting Frisk up into the air. She yanked at the thorny vines, causing her hands to bleed.

"LET GO OF ME YOU PIECE OF SHIT!" she screamed, and coughed, being choked by the vine. It threw her through the air, smashing her into the hard brick wall of a building. She slid to the ground, coughing up blood.

"I still need one more." Flowey said with a sinister grin. Frisk's eyes widened. 

"D...don't you fu...fu..fucking dare..." she said between coughs. Flowey smirked. A small red colored heart hovered over Jack, and a small vine curled around it. Frisk tried to stand up, but collapsed to the ground again. Mark lunged at the flower, but another vine shot out of the ground and smashed into him, throwing him backwards.

"Stop trying." Flowey giggled. "You can't stop me."