Bang! Bang! You're Dead.

I like this joke:

"Josh: Why did the chicken cross the road?
Psycothearapist: I give up.
Josh: To prove that he wasn't chicken.
Psychotherapist: Why did the monkey fall out of the tree?
Josh: Don't know?
Psychotherapist: It died. Why'd the second monkey fall out of the tree?
Josh: Don't know.
Psychotherapist: It died. Why'd the third monkey fall out of the tree?
Josh: It died.
Psychotherapist: No. Peer pressure."