You shouldn't do things that may damage someone else's relationship.
Dan and Troy are hanging out, and they have a history of pulling pranks on each other.
Dan wants to prank Troy.
Dan pretends that he's having the beginning stages of a heart attack and begs for help.
Dan calls Troy's wife and tells her that he just saw Troy with another woman.
Troy is amused when he realizes it's a prank and tells Dan he had him going for a while.
Troy is livid because the prank has gone beyond fun, and he's going to have to spend a  lot of time convincing his wife it was a joke.