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If you had been holding onto the bar end at the time, it would have been your fingers, wouldn't it?

He's saying use them like a guard, not as a handle

Perhaps the design should be combined with the guard ring of Oculus controllers:

https://i.ytimg.com/vi/D86jDhirxSY/maxresdefault.jpg

Handguards with wrap-around metal guards are a must on my dirt bike and commuter motorcycle. There is a small chance in an over-the-bars crash I could get a wrist caught in the guard, but this is unlikely and the more common incident I have is either a drop on a loose or cambered surface or hitting something like a bush or low branch and knocking it out of the way in a narrow gap.

USA right hook?

Correct.