A close-up reveals that the bouzouki Antoinette has been strumming has no strings.
After the fire Arty picks up Loveless's horn from the debris. But even though it was in the midst of the fire its leather sling has survived and is still totally intact.
When one of the henchman pushes a arrow into Artemus back he moves forward the arrow head is bent.
Antoinette is seen strumming a bouzouki while the soundtrack is filled with guitar music.
When West is tied up in the tepee with the crossbow pointed at his chest, there was nothing holding him upright - he would have been able to just lay down on his side to avoid the arrow.