Grieves noted that "I can see the muscle masses in the appropriate places ... If it is a fake, it is an extremely clever one." (Hunter and Dahinden, 120) Also like Krantz, Greive thought the figure's shoulder's were quite broad. He notes that a tall human is consistent with the figure's height, but also notes that for a tall human, "The shoulder breadth however would be difficult to achieve without giving an unnatural appearance to the arm swing and shoulder contours."[2] (home.clara.net...)

Grover Krantz
Krantz offered an in-depth examination of the Patterson film. (Krantz, 87 - 124) He concluded the film depicts a genuine, unknown creature, citing the following factors, among others:

Primarily, Krantz’s 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 suit.

Krantz pointed out the tremendous width of the creature's shoulders--which he estimated at about three feet across--arguing there was no way a suited person could mimic this and still have the naturalistic hand and arm motions present on the film.

Krantz and others have noted naturalistic-looking musculature ( Hunter and Dahinden note that ”the bottom of the figure’s head seems to become part of the heavy back and shoulder muscles ... the muscles of the buttocks were distinct” Hunter and Dahinden, 114) visible as the creature moved, arguing this would be highly difficult or impossible to fake.

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.”(Krantz, 93) Krantz argues that if Disney personnel (among the best special effects experts of their era) were unable to duplicate the film, there’s little liklihood that Patterson could have done so. (Krantz, 121)

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.” (ibid

Originally posted by wecomeinpeace
...and the smirking chimp