I can’t imagine an atomic family from the 60’s rolling up to this and getting caught off guard like that XD
I remember going to Moulin Rouge without knowing it was a musical!
For me it was being maybe 13 and tuning in to the last half of Lord of the Flies at about 1am. Those kids abandoned on a lonely island, followed by the rescuer showing up, followed by credits, followed by the national anthem and test colour bars will forever be burned into my brain.