Two blondes devise a plan to rob a bank - each reminding the other how they must be careful because they are thick. It's decided one drives the getaway car and the other raids the bank. The getaway driver one constantly reminds the raider one that she MUST NOT BE MORE THAN FIVE MINUTES IN THE BANK - FIVE MINUTES ABSOLUTE MAX. Anyway the raid takes place the getaway car is reved up rearing to go and the five minutes comes and goes until twenty minutes later the raider blonde comes out dragging a bloody great safe behind her with rope round it. The getaway blonde shouts at her "OH my god - I told you to tie up the guard and blow the Safe!"