YouTuber MikeBURRITO posted this video of himself trying to achieve a personal record on himself deadlifting 570lbs. He got the PR then tried to add 30 pounds and ended up passing out. No description here can outdo his own:
At the Kosciuszko Community Center Deadlift competition in 2013 I weighed in at 239lbs. my opening lift was 525, then I PRd my second lift at 570, then took a quick nap after trying 600.