Wow, what a crystal clear video - such a service Orser has done.
The difference in camera angle is everything. Not only does it make clear that she keeps most of her backwards momentum, but it makes clear the forward body lean maintained throughout (especially of the outstretched toe-foot, but also of the spin axis) that makes this possible. She can push against that lean to create the spinning torque in such a way as to generate no torque in a direction that would cause the spin axis to tumble, or the body to pitch forward or back.
Menshov's 7th and 9th jump at this video
]
at 0:45 and 0:54 are about a vertical axis, and he does stop and lose all of his backwards momentum.
Are those jumps inferior?
[BTW, that link is from 2010, so is not a spoiler.]
------
Such a shame that I can see these videos and appreciate the underlying physics without being able to do the jumps.
I'll have to wait for the USFSA and ISU to allow us to compete in avatar bodies built to spec or cloned from the bodies of famous skaters. Perhaps next year.