do you have any clips? I had a hard time imagining this. What i imagine is: no faceplant, just rotate the body and keep rotating until uke lose its own balance, the cut can be gentle as uke has already been destabilized enough.
I'm getting confused. What is it that you are having a hard time visualizing? If it is the "oops, throw your feet in the air break-fall," there is a great example of it in your own profile picture.