Yes, these are (apparently) all true.
A man is having a few drinks at a bar when he looks over and notices a drunk guy passed out at a table nearby. The bartender tells him the drunk is Mr. Murphy and asks the man if he could drive Mr. Murphy home.
A young man moved into a new apartment on his own, and went to the lobby to put his name on his mailbox.
A man is in bed with his wife when there is a rat-a-tat-tat on the door. He rolls over and looks at his clock, and it's half past three in the morning.