After Toothless had caught close to 60 fish, they ate. Hiccup was eating fish without cooking them first. This action confused Toothless for he thought that human liked to cook their food before eating it.

   Hiccup, you do realize that you are eating raw fish. This caused hiccup to spit out the bite of fish he had and then wail in fear of being sick. "WHY DID YOU LET ME EAT SO MANY RAW FISH!?" I didn't notice it until now. Why didn't you notice. That was a question that caused Hiccup to think for a few minutes. "I think it is because I was a dragon last night and I am slowly turning into a dragon." That would make sense. Still, the question remains; How?