League of Legends, released by Riot Games in 2009, gives players a quick ping system to communicate without voice chat, and the danger ping is its red alert for enemies, ambushes and risky areas. Streamers and editors began lifting the sound from gameplay clips because its meaning is instantly clear even to viewers who do not play the game. It has since become a shorthand warning in gaming montages, reaction videos and memes, where a single ping tells the audience that something is about to go wrong.