Thanks to the hurly-burly of modern life, we seem to spend every moment of every day under constant pressure. School, jobs, relationships, the constant threat of velociraptor attack, the list seems endless. Among this litany of pressures, however, is one that we cannot do without. I'm talking about air pressure. This week I want to show you a neat demo you can try at home that takes advantage of a quirk of air pressure. So sit back, relax, and make sure to keep your velociraptor spray handy.