Those guys exaggerate their lifts. I saw the video of Larry Allen supposedly benching 600-ish a few years ago. He bounced that shit off his chest, arched his ass so far off the seat that I thought his wang might hit the drop ceiling, and the dude spotting him practically yanked the shit off him anyhow. Don't be too impressed by numbers, is what I'm saying. I could probably lower over 500 to my chest if I knew someone would be there to yank it off me. I wouldn't say "I benched 500" after that though. Not sure if it is the same with the dude you mentioned though.