So can anyone explain to me how a giant black mark on the ground indicating A BIG FUCKING EXPLOSION is 1 foot away from an enemy AI in Coop that dropped me as soon as he saw my nose poked out from behind a door, this is as you can guess an enemy AI that I threw something called a GRENADE straight at. I was on Summit in Coop with a pretty good team of randoms I've played several matches with tonight. We were insurgents and we were coming to I believe the 3rd objective. Watched a lad get dropped from the stairwell so I knew...."Hey Watson I do say there may be an undesirable right in that entrance 🧐" "No shit Sherlock there's definitely someone in that fucking spot hey catch this asshat" and threw a grenade. Saw it bounce right down the stairs to where he was. I dropped threw the hole on the side of the objective it was the 2nd floor of the building with the stairwell in front of me. I ADS and Sam Fishered my ass to where he was. I saw the black mark from where my grenade detonated. This guy one shots me so fast that COD fans would lose their shit screaming hacker into the mic if I'd done that shit during a match. Death Cam hits and point right to the guy in the stairwell and I'm just staring at that black mark of bullshit literally at his feet. What in the H E double FUCK is this shit.