In the second round on the short par-4 5th hole at the Barclays, Mickelson hit his tee shot into the hospitality tent and then proceeded to play the ball as it lies.
And then in the third round, he did the same thing, although he knew how to play it from the astroturf this time.
The most amazing part of this is that he was able to hit the cart path both days. That is consistent golf, and I wonder if Mickelson will play the hole the same way next year.