Totally personal side note here. I saw a 'That's incredible' TV advert mentioning but not explaining the Sacramento shop front with the sliding wall. I never s

Totally personal side note here. I saw a 'That's incredible' TV advert mentioning but not explaining the Sacramento shop front with the sliding wall. I never saw the program. It was the early 80s, I was under 10 years old, and I was left confused until literally just now. Thank you. That's a personal 30 year mystery explained.