Sidelined due to an injured thumb, Rajon Rondo is out indefinitely for the Chicago Bulls. But while Rondo may not actually be able to play in Game 3 of Chicago's first-round series against the Celtics, the Bulls guard appears to be doing what he can to help out from the bench.

However, Rondo may not be helping in a legal way.

In the first half, after Celtics forward Jae Crowder hit a three, it looks like Rondo tried to trip him as he run up the court:

Now Rondo could also be trying to move his leg out of the way of Crowder but on the other hand, he could also be trying to trip the Celtics forward. Whatever Rondo is trying to do here is all in the eye of the beholder, so you be the judge.