Saw it too and thought: "hope he didn't back wash" :-))))))
Yes, I did see that too, and went HUH??
As to your second comment re: Steve and Adam on the last hole, Steve, in my opinion at that time was irrelevant. He was not hitting the ball, and after the collapse on the last 4 holes I don't think Adam was in any mood to talk or wanted condolences so it was probably wise to stay away from him.
Funny, but still ewww. You don't see sharing of water bottles in any sport .
Have a good evening.