Jeremy Lin went down with an ugly knee injury in the fourth quarter of tonight’s game against the Indiana Pacers after going up for a contested layup.

The replay’s somewhat hard to watch, with Lin seemingly in shock for a few seconds after crumpling to the ground before repeating, “I’m done. I’m done”:

He’ll have his knee evaluated tomorrow, per Adrian Wojnarowski of ESPN. While it’s encouraging that he was able to walk off the court on his own, there’s still “tremendous concern.”

H/t @C_L_I_C_K