Well lag switching I think. Was just running a game of salvage and came across this team of three. All 6 of us had green bars before the match started, after the match started and during the match. When you'd go shoot this one guy, his bar dropped to red instantly, he took no damage but dealt damage faster than the vex should be able to. this went on the entire match. Either this dudes IsP is spotty as hell or he's just a loser w/ a lag switch.