Rockinboy2000, Legoboss, SqartleTurtle, and I were playing Arma: Cold War Assault (Probably the worst, most buggy game I've ever played; and the most fun) with some zombie mod (Much like DayZ except buggy as forget). Lego had adjusted the settings such that there was a skeleton whose difficulty setting was at the maximum (only one skeleton per map, though).
We were approaching a military base when we saw the skeleton coming toward us from over the hill. As you know, superfast modded entities in most cases play the running animation at normal speed while running at supersonic speeds. The problem was that unlike normal, this skeleton was crawling at hypersonic speeds. We all retreated into a hut, where the skeleton proceeded to consume Rockinboy through the wall of the building. It then broke both of Squartle's legs, leaving Lego no choice but to put him out of his misery using a chainsaw. The skeleton then found its way into the building and murdered both me and Lego, marking the brutal end of our party.
The second incident involved a helicopter. Our party was flying across the map in a sizable helicopter, and I was told that I could enter third person by pressing numpad enter (I was relatively new to the game at this time.) I accidentally pressed the regular enter key, ejecting me from the vehicle. After some hysteria, I realized that I was equipped with a parachute, and was able to descend safely. About halfway through my descent I spotted an entity approaching from a nearby hill. It was the skeleton, running at hypersonic speed toward the helicopter. After reaching a point about at a 45 degree angle to the vehicle, the skeleton stopped running, and looked up toward the vehicle. The helicopter's engine instantly exploded. The three who were still in the vehicle spiraled down to the ground and died violently in the crash, and I proceeded to run the forget away from there, only to be killed by the skeleton several seconds later after it had finished off its first three victims.