There’s no such thing as a free lunch (or cinema ticket)!.

This weekend, Bristol locals will be able to watch ‘Back to the Future’ for free at Bristol & Bath Science Museum’s pop up cinema. But there’s a catch…the film fanatics will have to cycle to power the screen.

The movie will be aired on a pedal-powered screen and volunteers can take turns on one of the 10 generator bikes to power the 116-minute film. But don’t worry, there will be back-up power if needed!

The event launches a competition in Bristol aiming to increase the number of environmentally friendly commuter trips.

Let’s hope there’s enough popcorn to keep the cyclists (and the screen) energised!

Image (c) Back to the Future.