Is there such thing as a funny pun?

Question

Is there such thing as a funny pun?

Answer 1

there is bt i can't think of any in this instant!

Answer 2

Did you hear about the guy whose whole left side was cut off? He's all right now.

There was a sign on the lawn at a drug re-hab center that said 'Keep off the Grass'.

He drove his expensive car into a tree and found out how the Mercedes bends.

Be true to your teeth, or they will be false to you.

Answer 3

Well if there is, I've never heard one.  All the puns I read and all the puns my friends tell me are lame.  If you find one can you email it to me?