Prior to a recent Heat game, LeBron threw down an ungodly slam that makes his absence from the All-Star dunk contest even more painful.

Not sure who throws this one down, but it's a nice piece, including both a well-trajectoried bounce off the backboard and a one-handed finish.

UPDATE: Tom Haberstroh identified this dunker as Mario Chalmers, who dunks quite nicely for a point guard.

Chris Andersen's double-clutch 180-degree dunk almost earns him forgiveness from his historically incompetent dunk-contest performance back in 2005.