The dump eating paradox

[timsbucktwo]

You're taking your son or daughter out for a stroll when a man jumps out from behind the bushes and grabs your young kid, placing him in a neck hold. With one twist he could snap the childs neck and kill him. He says to you "yo, you gotta take a dump in your hands and eat it, or I snap this kids neck".

You notice you have a large, sharp flick knife in your pocket and are pretty confident you can take this guy. The question is, do you take a dump in your hands and then eat it, or do you think the guy is bluffing and attack?

Thoughts please.