 Oliver Hardy (qv) was injured during the filming of the scene in  which Stan keeps nicking him with the pickaxe. A rubber pickaxe was  originally to have been used for the scene, but it was decided that  it looked too fake, in action, so a real one was substituted. Babe  moved a little too close to Stan during the latters backswing, and  received a very real scar from the pickaxe on his rear.