several broken bones, extremely fast, Adrenaline Junkie,this guy is a distraction, jumping around you. He will only attack if you are not aiming at him. If you do so, he is hard to hit. If you manage to kill him he'll drop a adrenaline shot.
he has a low amount of hitpoints. So 1 well aimed shot will seal the deal.
this zombie climbs everywhere and is capable of making you motion sick.