It’s been a while since Los Angeles Lakers forward Metta World Peace showed his rough side, but it came out last night against the Oklahoma City Thunder. World Peace, a.k.a. Ron Artest, was celebrating a left-handed dunk when he bumped into Thunder guard James Harden. World Peace immediately elbowed Harden hard in the head, sending him to the ground. World Peace was quickly ejected. The hit happened so fast, it seems World Peace didn’t know it was Harden he was hitting, but simply bumped into someone and immediately lashed out. Harden didn’t return to the game—and with the NBA playoffs starting this weekend, the news is not great for the young Thunder.