I have died twice now due to glitches or lag. 1st time I closed a door for a buddy in a church and zombies were running through the door. 2nd time i couldn't close the door behind me and then spazed out throughout the house and couldn't use my shotgun. Sometimes a zombie will walk through the door halfway through the floor then disappear. I have walked a safe distance passed a zombie and as I'm about 50 ft from them I see them sprinting away from me then appear next to me.