1. [Rise of the Spaghetti-furs!] If you have "none" selected as your primary & you crouch, then switch to a weapon: it breaks your character model & you become spaghetti armed.
2. [Ricochets? or Recoil Damage?] Crouching while shooting can at certain angles hit yourself somehow, without even aiming at yourself mind you. I think the hit box for the player crouching may be broken.
3. [I Have Become Naruto! But At What Cost?] You can sometimes create "doubles"/duplicates of yourself if you spam click the map titles in the map change menu. I found this out by accident & I found it hilarious because the "doubles" are all tied to your movement, your health, & damage; So I decided to end myself with these 5 other duplicates just to see what would happen & all I saw once I did where a bunch of no-clipping & knifing headless cheese wedges just zooming all across my screen. Unfortunately, this bug also means the host will always damage himself no matter what in this state it seems like.