How fast do hotcakes sell?
Do you LIKE hotcake?
Suicide bombers. What makes them tick?
No tick, no bomb. No bomb, no suicidebomber. No suicide bomber, No tick.
All of the sudden some easily manipulated miserable bloke pops up and spoils a perfect catch 22...
But really, anyone can be pushed over the edge of their own morale in bad enough circumstances.
(There's another answer, but I don't want to turn too political here...)
Why do people constantly return to the refridgerator in the hope that something new to eat will have materialised?
Well, if you wait long enough something *will* materialise in there. Not very many would actually eat that though.
The real issue is that they miss their parents. As a kid, food tend to get delivered to the refridgerator at regular intervals by "magical" means.
If you put a chameleon in a room full of mirrors.....what colour would it turn?
Depends on how the mirrors are faced, and the lightning...
Are children who use sign language allowed to talk with their mouth full?
Generally, no. Ever heard a parent whose children stop eating? They'd have to put down the tools to be able to sign... 
But even deaf people tend to mouth words when they sign... (I have no clue what the proper word is for silently moving the lips as if speaking)