Team Fortress 2 launched in 2007, and its Demoman quickly became known for his love of explosives and his drawn-out Ka-boom catchphrase. The line spread through gameplay clips, Garry's Mod and Source Filmmaker animations, and early gaming meme edits where players paired it with oversized explosions. Because the delivery is instantly recognisable even without the game footage, creators kept reusing it as a shorthand for a bomb about to go off. It remains popular on soundboards for streams, reaction videos and short edits built around a sudden blast.