The Serious Punch comes from One-Punch Man, where Saitama names it as part of his Serious Series of attacks. Its best-known anime appearance occurs during his climactic battle with Boros in the first season, released in 2015. The sequence spread through anime communities as a shorthand for unmatched power and a completely one-sided finish. It remains popular in versus edits, gaming montages, reaction videos, and memes because the escalating buildup creates a clear cue for an enormous final impact.