"Grover KrantzAnthropologist Grover Krantz offered an in-depth examination of the Patterson film.[35] He concluded that the film depicts a genuine unknown creature. Primarily, Krantz' argument is based on a detailed analysis of the figure's stride, center of gravity, and biomechanics. Krantz argues that the creature's leg and foot motions are quite different from a human's and could not have been duplicated by a person wearing a gorilla suit.[citation needed]
Krantz pointed out the tremendous width of the creature's shoulders, which (after deducting 1" for hair) he estimated at 28.2 inches, or 35.1% of its full standing height of 78", or a higher percentage of its 72" "walking height," which was a bit stooped, crouched, and sunk into the sand.[36] The creature's shoulders are almost 50% wider than the human mean. (For comparison, André the Giant had a typical human ratio of 24%. Wide-shouldered Bob Heironimus (see below) has 27.4%. Only very rarely do humans have a shoulder breadth of 30%.) Krantz argued that a suited person could not mimic this breadth and still have the naturalistic hand and arm motions present on the film.
Krantz wrote, "the knee is regularly bent more than 90°, while the human leg bends less than 70°." No human has yet replicated this level lower leg lift while maintaining the smoothness, posture, and stride length (41") of the creature.[citation needed]
Krantz and others have noted natural-looking musculature visible as the creature moved, arguing this would be highly difficult or impossible to fake. Hunter and Dahinden also note that "the bottom of the figure's head seems to become part of the heavy back and shoulder muscles... [and] the muscles of the buttocks were distinct"[37]
Krantz also interviewed Patterson extensively and, as noted below, thought Patterson lacked the technical skill and knowledge needed to create such a realistic-looking costume.
Krantz reports that in 1969 John Green (who at one point owned a first-generation copy of the original Patterson film) interviewed Disney executive Ken Peterson, who, after viewing the Patterson film, asserted "that their technicians would not be able to duplicate the film."[38] Krantz argues that if Disney personnel were unable to duplicate the film, there is little likelihood that Patterson could have done so.
More recently, Krantz showed the film to Gordon Valient, a researcher for Nike shoes, who he says "made some rather useful observations about some rather unhuman movements he could see."[38]"