Michael Phelps went viral after staring daggers into rival Chad Le Clos. The South African swimmer seemingly taunted Phelps by shadowboxing and stretching right in front of him while the 19-time gold medal winner simply stared back angrily.

For those who don’t know their history, the two Olympians started out as friends and have a competitive and healthy rivalry up until Phelp’s retirement in 2012. However, things took an ugly turn when Phelps announced his return, and that’s where the trash talking began.

Fast forward to 2016 and the two are competing in the 200-meter butterfly. Le Clos attempted to taunt Phelps and continued to stare him down up until the race but to no avail, finishing right behind the American competitor.

Watch Michael Phelps and the US Swim Team do the ‘Running Man Challenge’ on Carpool Karaoke

But what Olympic fans really want to know is: ‘what’s Michael Phelps listening to that got him in such an angsty mood?’ The answer, taken from his profile in the New York Times, is his ‘prerace playlist,’ “a mix of songs from Eminem, Young Jeezy and a more recent addition, Eric Church.” Slim Shady has been getting some nostalgic recognition for his classics as we saw President Barack Obama getting geared up at the DNC to “Lose Yourself” as well.

While there’s no official prerace playlist published, we can only imagine the tracks get Phelps pumped enough to earn a second place finish in front of Le Clos. The two will compete again for the 200-meter tonight in the finals. When asked what was going through his mind at the time he made viral history, he simply stated “Nothing, honestly. I was trying not to even look at him. He does his thing, I do my thing.”

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