L4D2 Chargers.
Death charges from roof tops, into water, or down elevator shafts. It happened to me yesterday actually. I was playing as a charger, and had the perfect set up. No lag was to be found that day and it was glorious. I charge Francis, I hit him, but he doesn't go over with me. The charger, literally, pushes Francis directly to the right, instead of forward to his death. He rolled right off me even though I was directly in front of him, as if I were slippery. Must be all the infected goo.*raspberry* That was one of my more recent w.t.f moments.