Elaborate Plan

Two blondes decided to rob a bank and sat down to draw up an elaborate plan for the heist. They practised the routine many times in their heads. Then the big day came.

One blonde sat waiting in the car while the other went into the bank. Five minutes, ten minutes and then half an hour passed. She was not supposed to take that long inside the bank.

After what seemed like ages she finally came running out with the safe tied securely with a rope. Moments later, the door of the bank swung open and out came the security guard, clumsily blasting away with his pump gun because his trousers were down to the floor!

As they fled away in their car, one blonde said to the other, "You idiot! You're supposed to tie up the security guard and blow the safe."