Regarding height, I'm 6'1" with a 36" cycling inseam, so no shortage of length. But, obviously my saddle height accounts for my legs... Maybe it depends on the angle of ones ankle and how that impacts the saddle height? I might be able to take some pics tomorrow.
Obviously, I can bike just fine, I'm just trying to understand with the difference is because it kinda surprised me when I saw people doing that on video. That and look cool like a GCN presenter of course.