The twist.. it has to have come out before 1980.
he just turned seventeen, so he was born in 2006. He was born after Spider-Man one AND two, Star Wars episodes one, two, AND three. The oldest movie he has seen is he has watched most of the first Toy Story but never finished it. This is just context to make you feel old and show you how young this kid is.
You have to show him a movie that hes gonna like, before 1980. What are you going with?