On: Riding in a peloton is the most energy efficient locomotion – research (2018)

[latchkey]

The guy is on a fixie. Likely got to an RPM point on the downhill where it was actually safer to pull his feet off the pedals.

This isn't really as unsafe as it looks... or at least not any more dangerous than keeping their feet on the pedals at that speed.

I spent a lot of time riding around velodromes... you only forget to stop peddling once on a fixie. It is like riding a bucking horse. Perfect example:

https://www.youtube.com/watch?v=AXJmELmmXos

[TremendousJudge → latchkey]

It's the clipping back that's more dangerous

[latchkey → TremendousJudge]

Not really... you can watch him do it here https://youtu.be/p0mE2b5zu48?t=297 and here: https://youtu.be/p0mE2b5zu48?t=630

The guy obviously has skill and experience on two wheels, you kind of picked a poor example.