When Grossberger is singing, there are 5 men in a cell with only 4 bunks.
After Skip and Harry are arrested for bank robbery, they are sentenced to a state prison. Since bank robbery is a federal crime, they would have been sentenced to a federal prison instead of a state one.
While Harry and Skip are discussing leaving for Hollywood at the bar, no one is playing either pinball machine, yet pinball sounds are heard throughout the scene.
Skip is shown with multiple changes of clothes in prison. None of the other prisoners has clothes other than a blue shirt, white t-shirt and jeans. Skip is shown wearing a gray sweater , a blue sweater , a yellow t-shirt , and a blue t-shirt (in different combinations) in multiple scenes.
A boom mic ducks into view in the long shot of the scene where Skip talks to the woman in the department store.
When the cowboy at the bar sends a punching bag flying across the bar and into some hanging lights, it is obvious that the punching bag is sent flying by the use of wires rather than the cowboys punch alone. Since it is suspended by wires the punching bag is seen bouncing unrealistically for several seconds after hitting the lights.
The amount of beer in Harry's glass changes before and after Nancy visits the table.
When Skip is thrown from the bronco the first time, he is wearing gloves. As he rolls over on the ground, he is not wearing gloves. When Grossberger picks him up, he is wearing gloves again.
Caesar Geronimo uses alternating hands when riding the bull (Tornado). His right-hand is free while in the bucking chute, but his left-hand is free when leaving the chute (stunt rider).
When Harry strikes the match on another inmate's chest, a small 'strike plate' can be seen on the center of the inmate's chest.
Bank robbery is not automatically a federal crime. It depends on whether bank is federally insured or not. Also state and feds may agree to allow the state to prosecute depending on circumstances; as an example, state penalty may be more severe than federal. As a retired police detective I've personally investigated numerous bank robberies where the state has been the primary prosecutor.
There are 'civilian' photographers inside the bullring at the rodeo. It seems unlikely that prisoners and non-prisoners would be allowed together.
The chair with Skip's coat on it changes position between shots. When Skip returns from speaking to the 2 fighting men, the chair has moved away from the table.
Blade changes position before/after the bull chases Harry. He is standing next to the gate before the bull is released, but in front of the number 3 on the next gate after the bull is released.
Caesar Geronimo is wearing a black hat when riding the bronco, a light colored hat when riding tornado and a black hat when running the "Hard Money" event.
When Grossburger knocks out Jack Graham, as Skip is making his escape, his hat and sunglasses both come off, but in the next shot his sunglasses are back on, but his hat is nowhere to be seen.
Meredith gets a job as a waitress in a "raunchy strip club", yet she is fully clothed (long-sleeved shirt and jeans).
When Deputy Wilson wakes Harry and Skip in their cell, he tells them the time is 4:30am. Daylight/Sunlight is shining through the cell window.