Does Rocky Horror use the technique of "breaking the fourth wall"? If so, what scenes do you believe it is being used?

A couple times the fourth wall is broken. It's always broken by Frank who looks at teh camera as if to let us in on a little secret. Both times are in the Lab. Once when he meets Brad and Janet, Once During Charles Atlas Song, and another when he plasters every one with the medusa after Planet Schmanet.

Magenta looks at the camera after the medusering scene as well, nice touch.

Dr. Scott uses it to tell us "it was worse than I imagined ... aliens" at the dinner party.

The Crimonologist, of course. Frank cocking his eyebrow. "How 'bout that?"