I've seen a few impressive feats over the years in my gym over the years.
A few 600lb deadlifts, 500lb bench presses (for a double), 220lb dumbell shrugs, 1,200lb hammer machine shrugs (you can fit 765 on the bar plus two 200lb plus guys standing on each of the supports!), 1,500lb leg presses etc. All done by different guys over the years. Good stuff.