[1] The phrase was first used by promoter Horace Logan on December 15, 1956, at end of Elvis’s last appearance on Louisiana Hayride.
[2] Presley had appeared in the middle of the night's lineup, and Logan needed to quiet the audience so that the remaining performers could play.
[5] In later years the phrase would be spoken by some of Presley's backup singers to calm down the audience after concerts.
For instance, it might be used when someone makes a dramatic exit from an argument, to relieve tension among those who remain.
Baseball broadcasters on radio or television sometimes use the phrase as a humorous way to describe a home run, which is typically hit over the outfield fence, leaving the field of play.