Stun animations move player models too much, to the point where their hitbox is inside geometry and it makes them impossible to hit.

[dieteticaura]

View attachment Replay 2026-02-27 16-43-48 - Trim.mp4
Pretty self explanatory, but many characters have stun/knockdown animations where their model (and therefore their hitbox) moves far from where their character is actually stood. A stun should make someone an easy target, but in some cases it makes them harder to hit, as seen in this clip.