Reminds me of that scene in Soylent Green where the hero has to power his apartment by pedaling.
The Electricity-Generating Bicycle Desk That Would Power the World (The Atlantic)
Show up at the office one day with this handmade bicycle desk that generates power — enough to run your computer or charge your phone, sure, but also enough to mill grain, churn your own butter, run an industrial sewing machine, or split a dang log. Watch it split a log.