Wrapping your strap around your wrist is a good idea for a number of different reasons. Key among them: keeping your camera from hitting the ground should you drop it, keeping it in position to shoot, protecting it from someone looking to snatch and grab your camera, and keeping your strap out of the shot (something it takes people a while to learn).
Let’s call this one “The Heilman Maneuver”. Kinda like “The Reed Alert”. You trekkies and tv addicts will get it. 😉