There is a wire hanging between the twin towers (when they still standing) and on the wire are lots of blondes and one brunette hanging by their hands (don't ask me why). All the blonde and the brunette are quite heavy so, if they all stay on the wire, the wire will snap and they'll all fall. Then the brunette bravely says "I'll let go and fall to my death, to save all of you." Then the blondes, moved by the brunettes bravery, start clapping.
I don't want to offend any blondes, I just think these jokes are funny. Isca Monkey