
There's a movie (comedy) called
Spirit of '76 starring David Cassidy...
Some people from the future want to travel back in time to 1776 to the founding of America but they end-up in 1976. One of the future people accidently bumps into an 8-track, pushing it, starting the music. They ask, "What is that?" The kid from 1976 tell them it's an 8-track and he says,
"Don't they have THOSE in the future?"