[abc03]

It‘s not allowed by the UCI: https://cyclingmagazine.ca/sections/news/uci-rules/ And certainly not everyone should do it.

[Waterluvian]

Ahh here it is.

https://youtu.be/2QBcc87yoc8

Yeah, that looks insanely dangerous. I wonder how much higher the COG is in that pose. At least the example you provided looks dense and lower.