Thunderstruck is a song by Australian rock band AC/DC, released in 1990 as the opening track on their album The Razors Edge. Its instantly recognisable guitar introduction, played by Angus Young, helped make it one of the band's signature songs and a regular fixture at sporting events and in films. Online, short clips of the riff have become shorthand for excitement and build-up, used in memes, sports edits and reaction videos to signal that something big is coming, which keeps the one-second burst popular long after its original release.