Being on a film set is like being in tech forever. In theater, when you finally finish rehearsing, you go onstage and you do the lights and the sets and you make the machine of the production work. It takes usually about ten days in the theater, two or three weeks if it's a really big musical. I mean, it's hell on earth. You just sit around forever while they adjust the lights. And every playwright with half a brain runs for the hills when tech starts because it's so boring, and you don't want to talk to the director because the director is running this giant machine.