Poor human body doesn’t like anything that moves "to fast"
shockwave rippling through the air? internally bleeding human pulp meat.
Fast traveling sniper bullet hit you? externally bleeding human pulp meat.
being made up of such a high concentration of water… which REFUSES to compress for any reason, means that both make a shockwave in the human body where all the water in our organs and body move really fast in one direction, then snap back and move really fast in the other direction. (see high speed videos of basically anything happening to a human) This shock-wave tears at every essential organ and even if it doesn’t kill right away… often leads to all kinds of clotting and FUn™
Especially when this effect comes from bullets it is called cavitation. I think i suggested this else where. But it should be a thing with fast moving bullets in this game. Serious stunning, stopping, shock value possibility from faster moving bullets.