I know exactly what you mean! For years--YEARS--I'd remember the cantina scene in which the guy with the funnel for a head would pour a drink straight in, and every time I saw the movie I would watch carefully, trying to catch that bit and never able to. When I finally saw the SWHS again and saw that it was just Harvey Kormann, it was like a burden lifted off my shoulders: no wonder I'd never been able to catch that bit in the movie--it was never IN the movie! But that was weird, watching it the first time, eh? I was 6 also at the time, and I forgot most of it, just from time to time having these weird little clips in my head: the four-armed chef (Kormann again!?) and the announcer at the beginning saying "And R2 D2, as R2 D2!" Strange how things stick in the mind.