I used to love to hide from my sisters, then bolt out and surprise them when they didn’t expect it. Startling them was my goal, watching for that astonished reaction was my reward. It was a real disappointment if I wasn’t clever enough to make them jump and scream. Children like this game, although most would agree that it is preferable to be the instigator, not the victim. Surprise is a useful strategy. It is a tactic used to win battles in times of war, but it is not always easy to carry out.