Wikipedia
Boom Shot is a 1942 song composed by Glenn Miller and Billy May for the 20th Century Fox movie Orchestra Wives starring George Montgomery and Ann Rutherford.
Billy May is credited as his first wife, Arletta May, because he had signed an exclusive composer's contract with Charlie Barnet that prohibited him from writing anything for Miller under his own name. The song was published by Chappell and Company.
"Boom Shot" appears in the movie Orchestra Wives in two scenes, once played on the Wurlitzer jukebox in the soda shop as a 78 by Gene Morrison and His Orchestra, then during the outdoor dance scene in a segue featuring Harry Morgan with Ann Rutherford although it is uncredited on the soundtrack for the film. Glenn Miller as Gene Morrison is shown conducting his orchestra on the bandstand. The title comes from the wide-angle, mobile camera shot used to film the scene, known as a boom shot. The arrangement is by George Williams.
Usage examples of "boom shot".
A rolling boom shot around the curve of the canyon, with a cloud of dust on its heels.