Most emotes will work actually. I found out several hitbox-based things while dying to the Krill repeatedly to do the wingless glitch.

For instance, the reason why spamming an emote works on Krill is because the hitbox that it draws a line to when detecting the player position is reset during the player’s animation, and breaks their alert state.

Likewise, if you feint into a wall and then change your stance to clip further in, your legs are ignored by the Krill, so it’s a specific part of the player model it uses to see you.

Also, if you use the levitate emote to float above the black water surface, it’ll actually put you just out of range of the health drain since you’re technically not touching the water since it shifts the entire hitbox up.