Thomas Wilson/HBOJohn Wilson goes from getting stoned at home every night to getting ripped in his latest episode of How To with John Wilson, which aired Friday night on HBO. It’s an inspirational path, even if it leads him to the strangest people in the world—like body-builders participating in a 9/11-themed competition, cat photographers, and giant pumpkin growers.Wilson gets the idea for this episode—which is all about how to work out—from a muscularly built steward he sees on a flight. The m