how did this happen?

hey guys, i just wanted to ask you if this happent to you because i've been getting this bug since 3 days ago
sometimes i get infected and im infected/human (infected with weapons )
and i can use ump, m16a3, all kinds of weapon.
screenshots

lucky bastard but you only have 0hp lol 1 shot = fatal death but still nice you can shoot them down???

did you install a mods before that problem came?

and btw you might want to erase your name if that is you :P

Yes, sometimes mods do that. For better or worse, it depends. Once a mod basically erased my zombie's hands(unintentionally).