Also called the 'Domino'-effect. Originates from the famous historian Lord Pyro the 42nd. He would have one of his frequently-seen periods of rage, and this feeling would stick to others. Happened a lot during wars and outings. He would later assault his team-mates, with only one type of weapon, which has spawned the term "One-item".
A: Great, my character just died. I don't want to play anymore.
B: Careful of The Pyro effect now.