Two. One to change it and one to yell "Ta-daa!" when he's done.
Only one, but he'll just hire a ghostwriter to do it for him.
If you know the number, you don't know where the socket is.
Motorist: I was making a U-turn and changed my mind.
Two, two, two
Both are yelling at the same kid.
He yelled, "A u, fish!"
One is a cunning array of stunts.