What is the worlds best joke?

This is believed to be the world's funniest joke:

Two men are out hunting. All of a sudden, one collapses. The other guy calls 911 and says:

Man: Help! My friend is dead!

Operator:Calm down sir. We can help. First, make sure he's really dead.

Man:Okay, so now what?

If you don't get it, you have problems. (no offense)