After Doc dies, Cheyenne lifts him off the ground and Doc's legs are straight, but as Cheyenne starts to walk Doc's legs relax and bend at the knees.
Luke lay wounded and leaning against a big rock. He gets up and the rock wobbles.
Clyde Howdy plays three parts. One as a member of a posse who gets shot, another as a bar patron and still another as a posse member in a different town. As a member of the first posse he even had a mustache.