Ron tries to slaughter a pig in the park for a BBQ. He is not allowed to because it is against the law and violates health codes.
The townhall meeting includes complaints about various externalities associated with parks including frisbees and dog feces. The Baraguá delegation describes the command and control approach used by his country when citizens impose externalities on others.
Andy and April are using Ben’s things without his permission and it’s starting to bug him. The two negotiate for ways to remedy the externality.
The citizens of Pawnee drink from a water fountain by placing their whole mouth on the nozzle. Ann correctly points out the externality in the situation that by kissing one water fountain drinker, you’re kissing them all.
A local resident doesn’t want a park built near her house because of all the potential negative externalities associated with them.