Here's a silly story for you -
Toby has this bedtime ritual. When Jed is the one to put him to bed, he goes and brushes teeth and such and then "sneaks" up on me on the couch to say good night. I, of course, cannot turn my head to look at him him, and when he says "boo!" I act very surprised.
Tonight, Toby added a variation to the game. He made sure I was not looking at him, waited until he was about a foot from my left ear, and proceeded to crash two pot lids together as loud as he could.
Later, after Jed had peeled me off the ceiling and I had checked to make sure I did not need a change of underpants, Toby remarked that it was the best surprise ever.