This is a very very simple point: When a coach has used a challenge in a half, he doesn't get another one. He's got to wait until the time is short enough and hope for booth review. It was embarrassing today watching the announcers blather on and on about whether or not plays should be challenged after the coaches had used them. I suppose Indy running a quick snap and basically giving up a down on a play to avoid a challenge after Baltimore had already use theirs was just adding fuel to the fire. The funny thing was that the guys in the Indy/Balt game understood that once Indy used its third timeout, they couldn't challenge. You'd think the would have understood the much simpler point that you only get one per half.