Ive had a few odd ones, Things that spring to mind are:
Strange Jugg glitch on town, Early rounds I ran up there the door was open so I bought jugg as normal but went down shortly after, I ran back to get jugg again but the door was locked, A teammate opened the door for me (didnt have enough points for both) and for the rest of the game 10 rounds or so I was unable to buy jugg. I would go to the machine and hit buy but all I would get is a thud sound. Ive had this a few times with random machines, boxs, boarding up windows and trying to revive team mates.
Slow movement glitch, An enemy and I punched each other at the same time with the knuckles and for the rest of the game I was in super slow mode. Walking and sprinting were the same speed, About a third of the speed of a normal walk. I was still doing the sprinting animation (arms swinging back and forth) but it was like I was doing it on the spot. I had to just stay in a corner for the whole game 3 or 4 rounds.
Last zombie wont spawn, Had this the other day it was 4 against 1 and it took us ages to convince the guy on the other team to down himself to restart the round. All 4 of us downed ourselfs 1st (after about 10 mins of searching for the zombie) after a few mins or running around the map on his own he eventually killed himself, The round restarted and the game continued as normal.
I pretty much only play grief now so have had loads of mad glitchs but these are the only ones I can think of right now