LeBron James unleashed a violent dunk on Chicago rookie James Johnson (Wake Forest) moments ago in Cleveland. Johnson, a reserve, entered the game and instantly tried to get physical with LeBron. That plan failed, miserably. Moments before this, LeBron angrily shook Johnson and flipped in a creative layup. He seemed perturbed that a rookie such as Johnson would dare to challenge the best player in the league. [vid via @Jose3030]