A Mini-Bike Powered by a Drill
Instructables user “BooKooDesigns“ reconstructed an old pocket bike he found in the garbage—and for a power source, the technician decided to turn to something a little unorthodox: a cordless drill. In the instructions, he recommends using one with 1700 to 2000-plus rpm.
The project took just 10 days to complete, and the bike got up to 35 miles per hour with a fully charged drill. “BooKooDesigns” mentioned that riding it definitely turned some heads.
If you'd like to build your own, you can find the directions here, but they come with a disclaimer: “WARNING this project is not for the ones faint of heart. On a scale of 1 to 10 its a 10 maybe even an 11 on how hard its to make something like this happen.”