zombies are slow and easy to Maneuver through. If Nemesis was on my tail, I'd run straight through a group of zombies. They would slow him down long enough for me to escape. If at some point I found a powerful enough weapon to drop him, I would do exactly that, though I would probably take a chainsaw or something and chop him up into bite-sized peices to ensure that he won't get up. Then I would drench those peices in gasoline and burn them until they are nothing but flakes of ash. He doesn't stand a chance... Well, a little confidence never hurt anyone.