VIDEO: Carmelo Anthony rolls ankle after stepping on ref

Hold your breath, New York Knicks fans.

Carmelo Anthony accidentally stepped on an official's foot toward the end of the first half of Tuesday's game between the Knicks and Celtics.

Anthony stayed on the floor for a while before walking off the court under his own power. He returned with a re-taped ankle in the second half, but subbed out 19 seconds later.