I've talked to a lot of people lately about my month-long stint in Bikram yoga.  Some of them, the traditionalists, smile while shaking their heads as if to say, "Yup, whatever -- you're crazy."  Some of them lean in closer as I describe the added sense of strength, balance, and flexibility that the experience of doing 26 spinal-spinning hatha yoga posures in a hot room guarantees Bikram students.  Too many of them say, "Cool, but I could never do that.  Too hard."