A guy and his blonde girlfriend decide to rob a bank.
The guy explains his plan to the girl and they drive to the bank where he says "Right three minutes is all the time you need, I'll keep the engine running" and hands the girl a gun.
She goes into the bank and time passes........ three minutes, four minutes ........ seven minutes. He is about to drive off, convinced that she has been caught when she struggles out of the bank dragging a safe tied up with rope behind her. She struggles into the car as the bank security guard hobbles out of the bank with his trousers round his ankles and starts shooting at the car.
As they speed away the guy says:
"You dumb blonde! ~ I said tie up the guard and blow the safe"
