I’m not sure it’s actually the “Froome” descending position, I’m sure others did it before him….
I’ve always assumed it’s based on a similar bit of “Aero-logic” to Graham Obree’s disallowed hour record bike “ski-tuck” type position.
If you’ve ever tried doing it, even if just for a giggle, it feels as sketchy as anything, so I highly recommend you don’t…
I find it funny if there’s no actual aero advantage, it certainly is less stable and makes control of the bike harder… it’s basically the worst way to ride a road bike down a hill, so I think a special award is justified…