I just entered a house in a server whose name i cannot remember, when suddenly, i heard a zombie. Naturally, i equipped my axe and prepared for combat, but the zombie didn't appeared (I closed the door, but then realized the zombie was inside). Immediately, i realized that the zombie was BELOW me, his head passing through the floor as he... got stuck somehow. I tried to attack him, but the little bastard was too low for me to reach, and he was hitting me whereas i cannot. I then went through the stairs and the "glitch" then dissappeared and the zombie was walking through the stairs. Naturally, i killed him and patched myself up cuz i was bleeding my a** off. Just to let you know this.

AS a side note... didn't knew zombies knew the no-clip cheat, if you understand me xD