....The force in which a person uses, causing or that a person knows, or should know, would create a substantial risk of causing, death or serious bodily harm.
I've been tossed a few times, even when expecting it, if you mess up your landing it's going to jar you. The taller your opponent is, the more it's going to hurt.
I would consider it deadly force as the following most certainly applies.
...create a substantial risk of causing, death or serious bodily harm., if you land on your head or any other object, or just get smacked really good on the ground, that can cause serious bodily harm or death.
Regarding carry gear, that's why I stick to trying to keep my gear at 3 and 9, if I ever end up on my back I can still reach stuff, if I ever get tossed and land on the side, it will hurt even if I can execute a proper fall (I'm way out of practice) but I think it's better than landing directly on my back with gear there.