Pat Dixon describes how he loves the fifth beer because it makes him look good, which are good qualities for a day drinker. This clip can be used to teach about diminishing marginal utility and increasing marginal cost. For Dixon, the 5th beer is the optimal beer.
Molly (Madeline Carroll) and her dad Bud (Kevin Costner) are driving down the road, but Bud is unhappy with egg salad sandwich as a lunch option. Molly quickly points out that they are on a budget and that if he wants to eat better then he needs to drink less beer. This tradeoff can be illustrated with a budget constraint in economics. Given a fixed level of income, the only way to get more (or better) food, is to give up something else.