The Material Emancipation Grill debuted in Valve's Portal in 2007 as the shimmering barrier at the end of each test chamber, built by the fictional Aperture Science to vaporize unauthorized objects and dissolve active portals. The sound became inseparable from that visual, and clips of it spread through Portal playthroughs, speedruns and GMod videos on YouTube. Years later it survives as a compact sci-fi wipe: editors who never played the game still recognize the fizz as shorthand for something being deleted, reset or teleported away.