It is good to advocate against drunk driving.
Gil is at a party when another guest, Jim, who is clearly drunk declares he's going home and pulls out his car keys.
Gil wants to express a concern to Jim.
Gil tells Jim that he should not drive while intoxicated as he may kill someone or himself.
Gil tells Jim that if he  leaves the party will be in danger of going dead, so he should drive home later.
Jim decides that it's probably best to listen to Gil and decides to take a taxi home.
Jim stays a little while but ends up driving home later and getting into an accident.