Boom is a guy who ran a 4.28 at one of our camps as a frosh. Now I will admit that staff was know to get some fast 40 times, one time they got a 255 lb DE at 4,29, and then at the combine he rand a 4.5. But back to Boom, he is extremely quick and sudden, he is smoking fast for 20 yards, good speed the last 20 of the 40, but wasn't a great sprinter either, he ran a 11.0 as a jr at Georgia state track championships, but he won the race in first 20 yards and was holding on at the end. He just can't maintain that speed like a true sprinter does, but he is lightening in a bottle, would be a great punt return, if he can catch punts.