The tune comes from Star Wars from 1977, where it plays in the Mos Eisley cantina as the house band, Figrin D'an and the Modal Nodes, perform for a room full of aliens and smugglers. Composed by John Williams, the piece was written to sound like familiar swing and jazz filtered through another galaxy. It became one of the film's most instantly recognisable cues, and short clips like this one now circulate widely online for Star Wars edits, bar jokes and reaction videos.