My best joke for the bar crowd

As of yet, has not been topped.

"What do you call a midget with his head up a girl's skirt...? (wait 2sec max) ...A Goblin' (make crude licking motion side-to-side with an open mouth, and make freaky 'uuhaaaah!' sound a goblin may actually make.)"

Works on anyone in a bar, best with a crowd of at least 5 people.
If you have any "short-friends" be prepared to write it down or tell it to them again. As they will add it to their repertoire.

a man walked into a bar...(wait 2 seconds)...ouch...