If you've played a game online, chances are you've experienced a rager in their full extreme, screaming glory. So it shouldn't be surprising that even top-level players rage, as Eurogamer discovered.
Here is a compilation of (sometimes celebratory!) rage moments during an European Call of Duty championship. One of the competitors notes that raging is done purposefully, as a psychological tactic of sorts. Apparently, the players do better if they rage, or so they think.