[2] In one scene from the 1927 silent film No Man's Law, Rex protects the modesty of a young woman (Barbara Kent) swimming in the nude from a pair of rowdy villains.

Chasing one around in circles, rearing up and bucking like a wild mustang, until he finally runs him off of a cliff, he sneaks up behind the other and nudges him with his nose over the ledge and into the watering hole.

By now Rex was a full-fledged "movie horse" accustomed to cameras and crew members, but he could still revert to his wild ways on occasion.

Rex dropped to his knees and attempted to bite Adams with his head thrust sideways underneath the car.

[2] The 1936 serial Robinson Crusoe of Clipper Island features Rex, but he appears in only some of the chapters; two look-alike horses double for him.