1)Exceptional detail of available online vids of the movement of Patty's stride (M.K.Davis & Thinker Thunker come to mind)
2)Davis claimed that John Green took Jim McClarin's re-enactment slides (photos?), at Bluff Creek (1968) with the same lens that Roger filmed Patty with. Now I have never seen anywhere where John Green said he had 'the' lens & the camera Roger used was from a rental shop. Is it not possible that Davis' estimate &/or framing method is off?
You will find that MK Davis is not very respected on this site due to his Bluff Creek Massacre allegations that he levied against John Green and others. Bill Miller did a good rebuttals on this. Again Thomas Steenburg and Bill Miller are readily available to discuss this.
Saw a video that Davis posted claiming a 'massacre' at Bluff Creek - thought that was bizarre. Yeah I certainly take notions/arguments like these with a grain of salt. Met both Thomas & Bill a couple times - once at Sasquatch Summit 2011 & the following year at Harrison as well, got some replica casts from Patterson/Gimlin film site.
"Always keep your mind and heart open..." - Henry Fonda