The Ion Speed Pro is a decent action camera and can often be found for well under $100. It's weatherproof as-is so no extra housing is needed. Image quality is very good in daylight. I swap it between my handlebar mount and a homebrewed helmet mount. It's mostly on my helmet now to save time between bikes, and because one bike has a handlebar bag that blocks the handlebar mount.

Image quality is only fair at night with more noise than the latest model Go Pros.

It can be a little picky about media cards so be sure to keep an eye on the camera's behavior. If it cuts out unexpectedly every few minutes or seconds with a blank card, and the battery is fully charged, try reformatting the card. If that doesn't clear up the problem try another Class 10 card.

Because it's primarily an action camera rather than a traffic documentation camera, the ultra-wide angle lens doesn't always record full license plate details on vehicles at the far edge of the frame. I'd rather have a moderate wide angle lens but for the price of the Ion Speed Pro I can't complain.

I delete most videos when I get home. Most are too boring to even look at. I have recorded a few instances of reckless driving but none resulted in accidents so I ignored 'em. So far I've reported only one, to the driver's employer (Domino's). Their safety hotline folks seemed satisfied with my report and didn't ask for a copy of the video. Most of the videos I keep are of local group rides just for amusing friends, if anything interesting happens.

Regarding advice to stay calm and do ... whatever, easier said than done. I've worked in emergency medicine, responded to several accidents and been in one pretty bad accident myself that broke my back and neck and caused a concussion, although I never lost consciousness. But despite my training and experience I did almost everything wrong after my own accident. The only thing I did right was to take care of my grandsons immediately and get them medical attention.

We may believe we know what we'd do in an emergency, when the adrenaline is pumping and we're in fight or flight mode. But until it actually happens we're just guessing. Usually we respond reflexively according to our training and conditioning. Few of us actually train as victims. We may train to respond to other victims, but not to prepare ourselves for our own emergencies.

So don't knock yourself for not being sure how to respond. And a camera is a reasonable precaution to record the most egregious incidents.