The line comes from Plants vs Zombies, the 2009 tower defense game by PopCap, where a deep voice warns the player that a large wave of zombies is approaching the house. It plays at key moments before the lawn is overrun, making it one of the game's most memorable audio cues. Clips of the warning later spread to YouTube, TikTok and meme edits, where creators reuse it far beyond the game to announce any looming group, deadline or disaster in a dramatic way.