Burning building

A brunette, a redhead and a blonde escape a burning building by climbing to the roof. The firemen are on the street below holding a blanket for them to jump into. The firemen yell to the brunette "Jump jump! It's your only chance to survive!" The brunette jumps and SWISH the firemen yank the blanket away leaving the brunette to slam into the pavement. "C'mon you gotta jump!" the firemen say to the redhead. "No! You're going to pull the blanket away!" says the redhead. They reply, "No its brunettes we can't stand! We like redheads!" So the redhead jumps and SWISH the firemen yank the blanket away & the redhead is flattened on the sidewalk. Finally the blonde steps to the edge of the roof. Again the firemen yell, "Jump! You have to jump!" The blonde yells, "No way! You will pull the blanket away!" When they try to convince her otherwise she says, "Look, nothing you can say is going to convince me that you're not going to pull the blanket away! So what I want you to do is put the blanket down, and back away from it..."