Sometimes when you right click to view in scoped mode it seems the weapon is pointing directly down at the ground or swinging around wildly in the air then downwards to the ground.

I could understand that this might be considered a point of realism, but if your character is considered clever enough not to point the weapon at his/herself, they're not going to point it at the ground like this either :P

I can't work out how I trigger it reproducibly. I think it's when coming to scoped mode out of a run. If I change scope mode (Ctrl+right click) then try again, it's fine.