Board Thread:General Discussion/@comment-5956954-20160303101737/@comment-5956954-20160314225909

1. the bone marrow theory is possible, but do tell that sans is a monster (maybe) so the bones of this skeleton might not be exactly the same as a real humans. i am not too smart on how marrows work, but if it really sliced sans chest, since there is no real containment like the real human body, how was it supposed to build up blood to the mouth in the 1st place, especially since skeletons only have the blood in their bone marrow. the only possibility would be that the slash animation actually cut his entire body in half in a way, but there doesn't seem to be any slice through the middle to show (that can be countered by the way that undyne's armor showed no damage, but her torso and lower body were sliced apart.) that is my two-cents.

2. good point. once the ketchup bursts, it should have arched in one direction. the only possible way it could've gone to the mouth to leak there, is if the bottle was actually inside sans, but i said jacket, so whoops. all i can rely on to fix this is the theory that the monsters' body is less physical than it seems (so the ketchup might get to the mouth by phasing through some obstructions, or even smashing the back of the jacket and ricocheting a bit of the ketchup up there.), and that the body is actually a projection of the SOUL, like an interactive hologram constructed from atoms of dust, and given color by the SOUL.

in all honesty, it would be really cool that sans might be human, but i'll get to that in a bit. in short, he might've been a human child that disguised themselves to get away from asgore and that. maybe.