- Discussion of personal magnetometers: the idea that humans emit subtle electromagnetic signatures that could be detected and measured remotely, with speculation about the “speed of magnetism” and its frequency characteristics.

- Proposal to harvest kinetic energy from human motion, specifically questioning how much useful electrical power can be generated by pedaling a bicycle and what duration of effort would yield a “significant” output.

- Observation that typical bicycle-generator demonstrations show riders struggling to keep even a few light-bulbs lit, illustrating the low energy density of human-powered generation.

- Reference to the One Laptop per Child (OLPC) project (laptop.org) as a real-world example of human-powered electronics, noting its hand-crank generator as a practical energy source for low-power computing devices.

- Brief confirmation that automotive alternators already implement the same principle—converting mechanical motion into electrical energy—suggesting the feasibility of analogous bike-based systems.