But the most weird incident took place during a tennis match between Frances Tiafoe and Mitchell Krueger at the 2017 Sarasota Open recently.
At first the match's announcer, Mike Cation, incorrectly thought the sounds were porn playing on a fan's cell phone.
Tiafoe's opponent, Mitchell Krueger, angrily blasted a tennis ball out of the court.
The second time you can really hear the audio clear is at the 1:50 point of the video.
Later the noise stopped and the players continued with the match.
"Well, that is the most freaky situation", he said on the Challenger Tour's livestream. Krueger and Tiafoe handled it in stride, with the latter loudly exclaiming, "It can't be that good" around the 2-minute mark. "I still hear it", screamed a broadcaster.
Seeing the amusing side of it, Tiafoe remarked that "it can't be that good" eliciting laughter from the crowd.
A woman in the stands was also spotted asking her young son to cover his ears.
Tiafoe did, too, winning the game, set and match.
It turns out, it was a real couple in "an apartment across the lake".
"Well at least somebody is having a good night", the announcer says to end the video.