In the episode Who Killed Cock Robin? of 77 Sunset Strip, in which Rust plays method actor Walter Legal, he rushes in to say that someone tried to kill him and when explaining to Jeff Spencer played by Roger Smith, he says "I was looking for cues" instead of CLUES and they simply left that in!
Rust not only read about psychoanalysis, he tried his hand at writing about it.
He also appeared at the Ivar Theatre in 1959 in Tennessee Williams' Suddenly Last Summer.
He was not only a great actor, he could fence, ride a horse or a motorcycle in a spectacular manner, juggle, play trumpet (it seems...see Bourbon Street Beat, Torch Song for Trumpet)... seems like what can't he do??