Walking down the fairway of the final hole at the PGA Championship at Kiawah Island on Sunday, Phil Mickelson and Brooks Koepka were both mobbed by a fanatical crowd.
Mickelson was leading Koepka by two shots, and on his way to aged 50 becoming the oldest major winner ever.
The PGA of America has since issued an apology to both players for losing control of the situation.
"While we welcome enthusiastic fan engagement, we regret that a moment of high elation and pent-up emotion by spectators on the 18th hole during the conclusion of yesterday's historic PGA Championship briefly overwhelmed security and made two players and their caddies feel vulnerable," said PGA of America CEO Seth Waugh in a statement.
"We always put player safety at the top of our list and are grateful that order was restored. I have spoken to both players and apologized on behalf of the Association."
Following Sunday's win, Mickelson said he'd never "had an experience like that" but also that it was "Slightly unnerving, but exceptionally awesome".
Koepka, who had surgery on in right knee earlier this year, had a different view on the experience.
"It would have been cool if I didn't have a knee injury and got dinged a few times in the knee in that crowd because no one really gave a shit, personally," he said.
"But if I was fine, yeah, it would have been cool. Yeah, it's cool for Phil. But getting dinged a few times isn't exactly my idea of fun.
"I don't think anybody really understands until you actually you're coming out of surgery how... I mean, even when I was doing rehab and there's five people kind of standing by your knee, you get a little skittish."
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