Interesting. Tiger did say something to the effect that his repaired left knee will allow him to do some things he couldnt previously. Could he be referring to a Hoganesque pivot around his left leg courtesy of a Hip Slide with a Delayed Turn? Cant get stuck from there.
If you pull the first two pics of Tiger off to your desktop you can click on them and turn them into a little animation that shows his Hip Slide nicely. The left knee has to go with it, anticipate it even but Im thinking while training this move its a Hip thing not a Knee thing for the brain. Tigers got a little Float Load there even which may be related. I try to float load and can struggle with it if my Hips arent sliding, or so I find.
Im guessing neither of these guys ever heard of the Angle of Approach so it'd be a Slide parallel to the Target Line most likely. The Left Knee doing the same.