Cave Johnson is the fictional founder of Aperture Science in Valve's Portal 2, released in 2011, and his voice, performed by J. K. Simmons, is heard through pre-recorded messages scattered through the game's test chambers. The combustible lemon line comes from one of those recordings, in which Johnson's rivalry with Black Mesa spills into a personal vendetta. Clips of the rant spread through YouTube edits, gaming compilations and later short-form video, where the quote became shorthand for absurd, overblown retaliation and kept the character popular long after the game's release.