This is 1014 lbs. 400-lb squats would not have prepared me for supporting 1014 lbs.
155 kg × 6 reps (if my max is 180 kg then this is 86.1% of 1RM taken to near 100% of effort on the last rep).
Dropping a 100 kg ball creates large forces – this doesn’t mean the body applies large forces to the ball.
Fred Hatfield outlined 37 factors which contribute to the ability to a lift a heavy weight, let’s talk about 4 of them: