What if …
you took a balloon and filled it with chocolate syrup that it was REALLY full, taut, and ready to burst.  Then, if someone bit it, would it burst all over their face and neck?  If so, it would look GREAT if it were filmed in black and white.  You could use it as some sort of effect in a cheap horror movie (b/c chocolate syrup makes great blood if a film is in black and white).