250% health scout? Doesn't take damage

Not sure If cheat or glitch but there was this one scout whom we shot 2k damage, he didn’t even go get more health but he killed fireteam on its location, how this possible? When i died it blinked health 250%

Sometimes an NPC’s health shows up. Not sure why. It might be an NPCs health.and they are freakin out there beyond 100%.
To know this…it must not say Bezerker or whateever at the bottom. But it will still look like the Predator’s health template.