Okay, I think I have it figured out. Petar is a...dun,dun,daaaa, A VAMPIRE! Yes, a direct bloodline from nosferatu. He walks by night feasting on the undead...aaaaaaaaaaaaaahhhhhhhhhhhhhhhheeeeeeiiiiiieiaaaa.
Without the wig and glasses, obviously.
If everyone keeps telling you you're a jackass...maybe you should check and see if you have a tail.