What to do when the bad guys break in

Ethan heard a "tap" last night and came out of his room scared. I told him that he had nothing to worry about, made a big show of opening his closet doors, checking in his bathroom. I told him that our alarm system is so good that should a bad guy get into his room, Ethan should invite the dude to have a seat, the police will be with him shortly. This cracked him up. He suggested they could play a quick game of rock-paper-scissors until the cops arrive.