Whatever euphemism you use — puking, urping, barfing, power yawn -- motion sickness is a huge problem for aviation. It's a common reason for student pilots to quit, a major impediment to aerobatic training, and such a serious problem for passengers that many pilots can't coax spouses or children to fly with them. In this interview, AVweb's aeromedical expert Dr. Brent Blue talks about what causes motion sickness and discusses the various drug and non-drug remedies available, including a just-released electronic device that looks like it might be the best answer yet.