Brumby being too harsh on Clarke IMO. What you have to remember is that the slower leg cutter dips. When Clarke first saw the ball leave the hand, not picking the slower one, which as Top_Cat said was very unexpected, he would have thought it would be a full toss on leg stump. I know he was playing for stumps, but with such a tight match situation you have to grab all the runs you can get, and it doesn't come much easier than a leg stump full toss. He failed to pick the slower ball, but his initial thinking wasn't really wrong, tbh.