Phil Mickelson made one of the most shocking breaches of the rules in recent golf history during the third round of the U.S. Open on Saturday, hitting a moving ball on the 13th putting green before it rolled farther away.

By hitting the moving ball, he breached rule 14-5, and was thus given a two-stroke penalty, taking a 10 on the hole.

And needless to say, Twitter went nuts:

Just saw a clip of the Lefty situation. Never in my life seen that. What’s the ruling there guys? Not in front of a tv. #madness

— Graeme McDowell (@Graeme_McDowell) June 16, 2018

I think that’s a serious breach…in that case I am sorry to say because I love Phil but that’s a DQ! 😢

— Edoardo Molinari (@DodoMolinari) June 16, 2018

Does Phil have a board meeting he’s running late for or something?

— LKD (@LukeKerrDineen) June 16, 2018

Phil just said it for most in the field. "Get me off this rat track."

— Dan Jenkins (@danjenkinsgd) June 16, 2018

Me: Well, Phil isn’t going to win the US Open so it seems unlikely he’ll do anything to add to his history of gaffes here.

Phil: Hold my tee.

— Kevin Van Valkenburg (@KVanValkenburg) June 16, 2018

Everyone always complains about pace of play. Phil Mickelson finds a way to speed it up and everyone complains more. I mean, you just can't win.

— Jason Sobel (@JasonSobelGolf) June 16, 2018