I've heard of leading targets, buy given that a bullet is travelling faster than the speed of sound (330 m/s) and the average human walks with a gun at about 2 m/s (at best) then the lead distance (assuming you're aiming from 100 m is about... 0.2 m. Why is the box a good foot in front of the guy!?!?!??!?!?!?!?!?!?!?!