You’re running through a war zone, rapidly firing your machine gun at the approaching enemies, then the screen freezes. Just for a second, but that moment was long enough for your opponent kill you with a headshot. The first time this happens, you might mutter a curse under your breath. But as delays continue and your death count climbs, you will eventually flip the coffee table, throw your X-Box controller and loudly declare — with obscene amounts of profanity — how over Call of Duty you are.