Look out below! Going coast-to-coast during his days with the Denver Nuggets, J.R. Smith takes off from the back-half of the paint to completely explode on former Spurs combo guard Gary Neal. A former Slam Dunk contest competitor, Swoosh has never been shy when it comes to flashing his ungodly ability to take it to the rack. We hate to say it, Gary, but this one looks like it was pretty painful. You probably still have nightmares about this one, don't you?