“Why don’t they just make the whole unicycle out of the same stuff they use to make the black box”
For cyclists, a smart product from Cerevellum called the Hindsight 30 could be the solution for keeping better tabs on cars coming up behind you. Designed by industrial designer Evan Solida after he suffered a run-in with a car in 2007, the rearview video setup is a video system that allows cyclists to see what’s behind them, and it includes a “black box” system that will record any accident that might occur.
I used to have a helmet-mounted mirror; it kept getting broken off. It’s a lot easier to keep track of a pair of glasses, and I prefer to always wear some for road riding anyway. They’re UV-only, so not too dark for any time.
This is the mirror I use (one of many places you can find it online; I can’t remember what it’s called). The mirror is plastic, and has rounded edges. The wire is very stiff and durable and the mirror swings both ways.