A few weeks later, Larry bought 42 one-meter diameter weather balloons. He tied them to a lawn chair and filled them with helium. Then he sat down in the chair with some beer, sandwiches, and a BB gun. Larry’s plan was to float about 10 meters above his backyard, enjoy a few hours in the air, and then pop some balloons with his gun to get back down. But things did not go according to Larry’s plan.