How could you use a bicycle to improve a vending machine? Explain.?

Question

How could you use a bicycle to improve a vending machine? Explain.?

Answer 1

I could create a machine which would use the bicycle's wheel to turn a generator, creating a relatively cleaner source of energy which could power the vending machine.  And if the rider generated a surplus of electricity, the building that hosted the vending machine could draw from that resource and save money on power for other uses.