OK, In the beginning of the movie will smith jumps on the wagon and then onto the leading horse in order to stop those horses from running of the cliff, he gets to stop them but gets thrown over the horse and is now hanging down the cliff himself holding the bridle, he tries to get the horses to back up so he can climb up, now heres where you get a shot of the horses legs, but wait when you look closely you'll see a boot between those horses legs as if someone was riding on the horse, but will was alone to stop those horses, hmmm big mistake there!!