My hunting buddy and I have been practicing this exact method as long as I can remember. The idea is to always be ready because you never know when or were that old big buck will walk in from. Usually it is from an unaticipated direction and the least amount of movement to get the shot off the better. I can't believe the TV guys that sit there with their bow hung up on their commercial bow hanger and standup and reach out to pick up their bow without ever getting busted. It seems like almost every time I relasx a bit something shows up and then its a real nerve racker to get into a good shooting position without spooking the deer.