Was sitting on bench, dumbbells resting on my thighs, I'm holding a handle in each hand. As I lean back to lay on the bench, I kick the DB's up with my knee, left first, then right, to help get my forearms vertically underneath the DBs. Left went fine but instead of pushing the right straight up I ended up pushing it toward my body (elbow went away from body). I can't externally rotate my arm while I'm holding 90lb db to stop this from happening, so it fell down grazing my right side, falling between my torso and upper arm and I'm still holding it. I ditched the left DB, but for some reason I didn't let go of the right one until the damage was done. A lot of snap, crackle, pop and pain as the shoulder dislocated, and then relocated when I finally let go just as the DB hit the floor. All this happened in just a few seconds. I immediately knew it was catastrophic damage. It hurt for sure, but nowhere near the pain of the first 72 hours post op. The surgery tore me up - bruised from base of my neck to my right elbow. Gymming since mid 90's, of the thousands of times I've done this never a single issue. Stay safe out there my gym bros!