They're not examining nor processing the root of the problem. Their brain hasn't actually processed what the problem is. They're just repeating something they heard. The root of the problem is inertia and momentum. When something is in motion, it wants to continue that motion. When your hand is moving in one direction and then quickly changing into another direction, that's a substantial G-force to a watch. A car accident is basically a car, driving down the street at 60 kph, hitting a tree, thus coming to a stop very quickly, and yet everything inside the car still wants to go forward at 60 kph, so our body and coffee cup is still traveling at 60 kph due to inertia and momentum. To the watch, when you clap your hands, each clap is similar to a little car accident. It's going in one direction at speed, hitting something, then reversing direction violently.