99.9999 % of the time whena animal "jumps the string" it was on high alert anyway, and the jump the string reaction is from string noise and nothing more... That sound is moving alot faster than the arrow ever can or will. Watch a hunt video and slow motion it down at the shot and watch. Most of the time upon release the critter will be setteling in for a leap . If you still don't belive just carefully do as mentioned above and stand downrange and listen....THWACK.....HISSSSSSSS....THUD..!