I workout by myself at the gym and do bench. I just leave the collars off and don’t go over 235 much. From the looks of these videos maybe I need to rethink my approach.
For whatever reason he dropped the bar to his neck instead of his chest.
From the chest, shouldn't usually be a problem if the weights don't have collars.
Metal plates will fall off if the bar is tilted, but in the videos I've seen where they're stuck under the bar, they're often using rubber coated plates and these seem to stick to to each other and are harder to drop from the bar.