You have to challenge there - worst case scenario is you lose and you are stripped of the timeout. Either way, clock is stopped. If you win, you GET THE TIMEOUT BACK!!!
I really did have high hopes for CDD, but he has made it apparent that he's not the answer. Gruden or other, Hart needs to make a change and bring in somebody who will re-establish a culture of winning and do it in a hurry.
Since the idiots didnt call him out he had to use the last timeout, therefore you cant challenge but what happened to all plays are reviewed?