The Sas
A guy passes all the requirements to Join the SAS. At his final meeting with the Colonel he is told that there is one final test. The Colonel hands him an automatic pistol and tells him to go into the next room and shoot his wife. He takes the pistol and walks determinedly through the door. The Colonel hears three shots and follows into the room where he finds the guy strangling his wife. He shout at him to stop and asks what he is doing. To which the soldier replies "Some wally put blanks in the pistol so I had to find another method to kill her.