Cited as a reference

Olympic Cyclist Vs. Toaster: Can He Power It?

The Toaster Challenge

Why people recommend it

Shared whenever someone asks about pedal powered generators, as a vivid demonstration of how little electrical energy even an elite athlete can produce.

Watch for: a reality check for bike generator ideas

In their words

This question reminds me of this video: [video] TL;DW: unless you're doing it for fun, it's not realistic.

user72833 on electronics.stackexchange.com, Aug 2017. CC BY-SA.