"Eh mate," says the stranger, "Can you give us a push?"
"No! Get lost! It's three in the morning. I was sleeping," says the man and shuts the door.
He goes back to bed and tells his wife what happened. She says, "Remember that night when we broke down in the pouring rain on the way to pick up the kids from the babysitter and you had to knock on that man's door to get him to help us? What would have happened if he'd told us to 'get lost'?"
So the man gets out of bed again, gets dressed and goes downstairs. He opens the door and, not being able to see the stranger anywhere, he shouts, "Hey. Do you still want a push?"
A voice cries out, "Yes please, mate." So, still being unable to see the stranger the man shouts, "Where are you?"
"I'm over here on the swings."