Tiger did have an option to take an unplayable lie in the bunker. He would have had to go back to the tee to play or drop in the bunker. He probably didn't want to drop in the bunker because it would probably plus so he would have been playing four out of a plugged lie and made double bogey. I'm sure he never gave a thought to just chipping to a flat area in the bunker, he could have turned his wedge around and done this easily if he didn't have room for a stance. He has that superman ego and can't stand having to take a penalty, he always believes he can overcome whatever the issue is ..... in the bunker I'm sure he felt he could get it on the green and make the putt for a par even though it was impossible.
In terms of the ball Scott had in the rough moving, I felt he should be penalized and I think the announcers did as well. When he took several practice swings and stood never the ball it started to move, he then walked away and the ball actually finished it's move. I think that he felt that he got an unfair advantage and it threw him off his game for the rest of the round.
Anyway it was great to see Els win, he is one of the great people and players in golf.