In the introduction sequence, there is no way the box of bottle rockets, as light (in weight) as it appeared to be, would have stayed in the position it was placed when the trigger wire was tripped, let alone when the wire was tied before West tripped it.
(at around 9 mins) After running out of town, as Dr. Raker reaches the edge of a ravine, there is a shot from below (essentially from down in the ravine) just before he falls into the river - in the shot, a jet can be seen in blue sky upper right above Dr. Raker.
When the Doctor throws the knife at Jim, you can see the guild wire.
There are tire tracks when Jim rides into town after the Doctor.
Obvious stunt double for Lee Kolima (No-Fun) when James punches him at the door of the Krause estate - notice that after West circle throws the stunt double for No-Fun against the mansion wall, his right arm conveniently covers his face.
When West attacks the two guys who find him in Lola Cortez's room they both crash into a chest of drawers, destroying it. However, there are no drawers in the chest, as it is a cheap fake designed to break apart so the stuntmen don't get hurt.