The scenes with the girl trying on clothes in the mirror were shot in Susan Pedrick's actual apartment at the time.
The scenes with the teen trying on different clothes were actually shot in 1979. According to Susan Pedrick, Gaikowski didn't really know what to do with the footage until he became occupied with the assembling of footage from Deaf/Punk (1980) , which also had Pedrick as an audience member, when he then had the idea for the "haircut scenes".