I own a gym, been in the fitness industry for 15 years. I do about 70 one on one training sessions a week plus teach 10 group classes so I move a lot of weights daily. Just from plates or dumbells I've broken a finger 3 times, seriously bruised 2 toes, worst injury was when I almost lost my "third leg" putting a 45lb plate back up on a waist high vertical plate rack. Worst injury I've seen is someone DB benching and dropping 100s onto the ground but he had 90s under him and his finger was in between both dumbells, finger exploded and blood shot straight out onto the mirror in front of him.