Thunder is a 1929 American synchronized sound melodrama film starring Lon Chaney and directed by William Nigh. The

film has no audible dialogue but featured a synchronized musical score and sound effects. The soundtrack was recorded using the Western Electric Sound System sound-on-film process. The soundtrack was also transferred to discs for those theatres that were wired with sound-on-disc sound systems. Thunder was Chaney's penultimate film appearance and his last film without audible dialogue.

The majority of the picture portion of Thunder is now considered lost, with only a half a reel of the entire footage known to survive. The Vitaphone type sound discs are extant, however, and preserve the soundtrack of the film.