When the player fully submerges themself with an Aerbunny on their head, the Aerbunny will desync with the player. This will cause the player to take fall damage, activate parachutes and will cause the bunny to teleport back to where it originally desynced when removed off of the head. The player still retains the jump height and the puff ability. This only happens if the player FULLY submerges themself AND the Aerbunny. The Aerbunny I was using is named just in case you need that info.

Aerbunnies will also fall off the player's head if you exit the world with an Aerbunny on your head. This is more of a balance change as to whether if you want the Aerbunny to disappear with the player on log off like with horses.