Continuity mistake: When the Coyote tests his dart bomb, he lights it with a match in his left hand. But when he throws the dart bomb in the next shot, the match that was in his hand has gone.
Continuity mistake: When the Coyote climbs into the hot-air balloon, there is nothing on the basket, but when we see the Coyote in the next shot, two sand bags have appeared.
Character mistake: On the side of the boomerang box, there are words reading "Return's to owner." It should read "Returns to owner."