One thing to remember about people who descend into a life of crime is they can be incredibly stupid and make poor decisions. On top of that, add drugs and alcohol and you set the stage for this film. None of the actions taken by the characters are really all that unbelievable, especially when you consider the backwoods area where it all takes place - there is a certain culture you'll find among working class, low income people in the rural south, and this film captures it well. That said, it does branch into comedy given the pure buffoonery of these people. Some of the dialogue is also layered well to provide comic relief. I think comparisons to Fargo are fair; I don't think the merits of this film quite raise to that level - but it does go into similar territory. It's a fairly light film overall that doesn't carry much much of a message or delve too deep, but it remains entertaining on a superficial level.