Which is why I said if you get a second challenge wrong you lose your ability to challenge..
I just hate that though. I'd rather have the stoppages than have the sort of thing where a coach challenges something close that's worth challenging, and then the refs totally blow something later in the game
I suppose that's possible with the challenge=timeout system too, just less likely. From my perspective, a failed challenge and a timeout are already essentially the same thing. My ideal system would have some sort of escalating cost where coaches could always challenge a play, but the more you fail, the worse it gets. I'd much rather have a coach making the decision on whether challenging a play is worth a 15 yard penalty, than have a coach not be able to challenge because the refs have already screwed up a bunch of times.
I guess that's my big issue with the current challenge system - it still punishes you even if you're right.