I keep thinking about the Pines family watching Back to the Future.

Dipper being a huge fan, and then freaking out when he realizes that Ford had gone through the portal before the first one came out, so he and Mabel force him to watch all three movies

And they get to the second movie, and Ford sees all this cool stuff of 2015, and he goes “we’re supposed to have all this stuff in 3 years? Excuse me, I have A LOT of inventing to do”