Whilst they are sitting on the bench having a drink, Ace knocks Junior's hat off. The view from the rear shows the hat on the ground beside Junior, but when Aces gets up and picks up the hat, it is a few feet in front on Junior.
When Ace and Junior are sharing a bottle of whiskey, the bottle jumps from Ace's right hand to his left between shots.
The wet spot on Junior's mom's shirt after she comes into the house from the garden.
During Junior's last bull ride, one of the shots shows him riding a different (smaller) bull.
About 20 minutes into the movie, Junior is drinking a beer at the bar. Just before he walks over to the booth to talk with Buck, Homer offers to buy him another beer. Junior tells him to leave it on the bar, and then Junior walks to the booth. We see Del, the bartender, put the beer on the bar next to another beer, but we see Junior carrying his first beer with him.