I happened upon a chap on the road who was standing afk or sleeping. I waited a while but he never responded so I knocked him unconscious with my fists and took his gear. Using his pickax, I then put him out of his misery, but the second he actually died my character stood up a little bit - which was kinda weird. However, from that point forward even if I hit spacebar to go into the attack position it I couldn't swing anymore. I also found that I couldn't shoot my weapon anymore. I ran around a bit and ended up with some zeds on me, my only solution was to climb a ladder and get on a roof top and log out. Upon logging back in everything was fine again. I was on Stable on a Regular server.