For Dudley, "Three point reverse roll to knife-edge" what?!

I threw out the Wiki on Dudley Henriques to MX on r.a.s. and then read this:

"During the early sixties, flying a Mustang, he patented a three point
reverse roll to knife-edge tactical pitch-out approach that became a
trademark manoeuvre." http://en.wikipedia.org/wiki/Dudley_Henriques

Well, that flew right over -my- head!

There doesn't seem to be video or some other internet source demonstrating
this that I can find. (but boy is it fun looking!) Can I ask what a
"reverse roll" is? (or a "tactical pitch-out approach")

Thanks!

-Chris Gattman
Portland