Continuity mistake: The amount of damage on the guys' car decreases between shots during the race.
Continuity mistake: When the rock holding the key to Pellit's home is thrown at the door. You can hear the key falling on the ground. Yet when the rock is picked up the key is still inside. There is also a doormat so why would they key make a noise?
Continuity mistake: When the guys are shopping for supplies to poison Pellit and Harken, Dale sweeps a number of jars of peanuts into his basket from a shelf at waist height. He then moves on to grabbing jars from a shelf at shoulder height. In the shot, suddenly the waist-height shelf is full of jars again and doesn't have any gaps where Dale previously took jars off.
Continuity mistake: While talking to Kurt, Jack's forearm switches from resting on the top of the car window to his hand resting on it, then back to the forearm.
Chosen answer: I doubt that was a conscious decision - while it's certainly an interesting parallel, getting someone drunk to laugh at them is a common enough scheme.