I had this (both) things happen to me today. I was on the 2nd floor of one of those homes that has the static 3 pair of shoes by the door. I was headed to the other side, when I suddenly started clipping into the wall and was spat outside, landing on the ground to death. After about a 7 sec WTF moment with my 2 friends, I logged out. They were looking for my corpse and found it after about 2 minutes. I logged back in and they said, OH CRAP there's 2 of u now! I yelled HOXTON BLOOD! for lulz. I was alive, with all my gear in the exact spot I hit the ground, and my corpse was there too with unintentionally duped gear.
Later in the night we were around the NW airfield. I was on the 2nd floor of the fire house, scouting because not long ago there was a bandit. I noticed my screen was awfully grey. So I went down the steps where my other 2 friends were standing. We started the process of an IV/Blood transfusion, when all of a sudden it just said "you are dead". No bleeding, no infection. All I came across was there is a bug whenever someone else performs an action on you. We had made blood bags and done blood tests. I was only hit by a zombie 2 hours earlier and had scores of food, water, anti, and vitamins along the way.