Corrected entry: In the scene when Quigley and Crazy Cora have passed out due to exhaustion and dehydration (after walking through the desert) they are seen lying on the sand. There is a slide mark where Quigley apparently dropped and slid. The slide mark does look like the path that his torso made, but there are no marks made from his legs and there are no marks at all where he dropped Cora. In fact, she is lying perfectly straight and face up. He was carrying her over his shoulder. It is very unlikely that she would have ended up in this position.
Robert Sullinger
18th Mar 2009
Correction: Unlikely doesn't mean impossible. Since we don't see the actions that cause the impressions in the sand we can't say the way they look or the way the people are positioned are mistakes.