Step one: Purchase ticket from underpaid Cinerama staffer. Step two: Retreat to vehicle in order to... uh, put yourself in the proper frame of mind. Step three: Return to theater, take a seat up front, and get ready to watch Tron—yes, Tron!—the way it needs to be seen, in its full 70 mm cinematic glory. "Take that program to the holy pit!" (Cinerama, 2100 Fourth Ave, 441-3080. Noon, $7.25–$8.25.)