Ethan
Money List Winner
Here's what I think happened. He missed the 4-footer, moved in as though to scoop it up with the back of the putter in frustration, suddenly realised he couldn't do that as it hadn't instantly been conceded (as far as I'm aware), felt a little embarrassed and awkward and decided the easiest course of action in the circumstances would be to quickly concede Molinari's and get the hell out of there. But this is, of course, only my opinion and may well be wide of the mark...
Very possible, Jezz. It did have a look of being a bit of a rushed decision. I don't care much for Tiger, but willing to give him the benefit of the doubt and kudos for a sportsmanlike act, even if sorta unintended.