The leg dangle, clearly explained...

[Kneedragger]

A detailed breakdown that actually makes sense, by Silvain Guintoli...

https://www.youtube.com/watch?v=99Fat0jLj_U

[802Mike]

Way back when on a site long, long ago when Valentino first started doing it I called it an "air brake".
Someone called it bullshit.
Okay, there's more to it than that, but it adds wind resistance like when the rider sits up coming into
a corner helping to slow the bike.

[R111S]

Thanks for sharing that Charlie. Good old "Body English" comes to mind. Some folks instinctively know how to move their body/limbs to improve the dynamics in play.

[Bmorganjr]

I was leg dangling long before the doctor......but only to keep from falling down......?

[Loggiebone]