When Laura rams Bob's car, it is clear that no-one is inside although Brooke were having sex inside a few seconds before.
Laura's hand is shown in different places in shots when they announce her speech.
You cannot handle butter sculptures with your bare hands - that's the temperature at which it melts.
Near the beginning, when Bob's story is being narrated, there is a news clipping shown. The sentence it starts with ("If anyone in Johnson County," etc.) is repeated at the end of the clipping. It is not impossible that the newspaper proofreading department missed this obvious mistake, but it is more likely that it is simply laziness on the filmmakers's parts in not supplying a different sentence.