Three guys, one Navy, one Army and one Royal Marine are taking the test to join the SAS. They have all passed the mental and physical sectinos and are down to the final interview.
Guy from the Navy walks in to be confronted by the SAS Head Shed who gives him a gun and says, "There are 6 bullets in that, your wife is upstairs, go up and kill her".
The guy disappears but comes back 2 minutes later to say,
"Sorry I really want to be in the SAS but she's my wife and I love her"
"Sorry" says Head Shed,"But if you can't take orders, we don't want you"
Guy from Army walks in