I know one of the aspects of the Patty film that seems to grant it such apparent veracity is the length of the arms and how, if the hypothetical person in the suit were using sticks to control the suit's forearms, it would require the person's forearms to be bent at an impossible angle at an impossible spot. But I was wondering...couldn't the hypothetical person in the suit just have his arms going straight down to the creature's elbow and then, from there, with thumb pointing toward the ground, manipulate sticks to fake the creature's forearm action? Also, what if the top of the person in the suit's shoulder was actually below the creature's armpit, and that person's arm entered into Patty's arm below where the joint seems to be, thus allowing his own arm the ability to bend at Patty's joint, and from there manipulate the sticks? The person's eye line would probably reach about at the top of Patty's ribcage, but if he had some sort of harness jerry-rigged so that, when he turned his head, the Patty head above could turn at the same time that his did...also, as is done with mascots, the "eyeholes" for the hoaxer could be a sort of hair-covered mesh located, once again, around the area of the top of the ribcage. Does Patty's arm, right below the armpit, ever swing outward enough from her side to show a definite space where the armpit should be?
Anyway, I'm sure I'm not making a whole lot of sense with this. It's rather difficult to demonstrate in words alone. Maybe I'll whip something up in MS Paint or something.