Sigma is a tank hero in Overwatch, a team-based shooter where each hero has a signature ultimate ability. His ultimate, Gravitic Flux, lifts enemies into the air before slamming them down, and its voice line has become a recognisable cue for players. Clips of the line spread through gameplay videos, streams and short-form edits, where fans reuse it to mark a turning point. It remains popular because it is short, dramatic and instantly tied to a powerful in-game moment.