My colleague is half asleep because he took sleeping pills. While he is in this drowsy state, I give him a punch in the stomach when he is completely relaxed. This causes his reaction to be minimal, as the pills have made him quite sleepy and his body does not respond in the same way it would if he were fully awake. It is as if his nervous system is operating at a slower pace, and his reflexes are not as quick or strong as usual.