I watched a guy squat 600lb in the gym today - only for one rep mind you but down to parallel and good form - you guys are probably thinking "that's not that much" but I've never been to a powerlifting contest in my life and it's not often you see that in the gym with your own eyes. I was impressed.
I watched a guy bench 585lbs once , needless to say the whole gym stopped and watched , his petite wife or g/f was spotting him , he didn't need any help anyway
I watched a local cop load 315lbs on the smith machine and I thought he was going to squat it he ended up doing behind the neck presses for 8 full reps with no spotter I was impressed
600lbs squats are crazy , one item I never wait for is a squat rack lol it's always empty