There are basic rules of magic. Never show your audience how to do a trick. Don't explain how you prepare for a trick. And don't perform the cups-and-balls trick with transparent cups. Penn and Teller break all of these rules and more during their show at Rio Hotel and casino. It's amazing. As with every great duo Penn and Teller both have their strengths and flaws. When they combine, it creates the perfect mix of comedy, magic, and entertainment. Penn, who is tall and lean, serves as the narrator. Teller, on the other hand, handles most of their action. There are elements of magic and sleight, but the majority of the tricks are innovative and creative. It's great fun to watch the duo share some of their tricks with the audience, while others are intended for complete confusion. Penn & Teller, a Vegas staple, is funny, entertaining, and a vacation rite-of-passage.