A blonde robs a bank
One day a blonde and a brunette decide to rob a bank. The brunette comes up with the perfect plan. She tells the blonde girl to be in and out in less than 5 minutes. So they go to the bank and the blonde runs in. 5 minutes pass and then 7 and then 9. Finally 10 minutes later she comes out dragging a safe on a rope. About the time she gets it in the trunk, the guard comes out with his pants and boxers down and is shooting at them.
As they get to the safe house the brunette says to the blonde " you idiot, you messed up the plan" the blonde says "no i didn't" Then the brunette says "you did it backwards!!" When the blonde asks what she meant the brunette says "you were supposed to tie up the guard and blow the safe!!!!!"