Vanilla Stunning

Stunning is the double clicking of the mouse to disable the shield and do a tick of damage at the same time. Recently stunning was removed, and an invulnerability tick was added right after a shield was disabled. I think that disabling a shield should automatically cause vertical knockback. It would be useful in pvp, and would be a good feature in general because you would think that slamming into a shield would cause the shield user to be sent back a little, not completely tanking knockback.

This idea was proposed by TheoBaldtheBird.