scott: robbie kellman baxter's book is "the membership economy." thanks for being with us. robbie: thanks for having me. scott: "press:here" will be back in just a minute. [music] the only roller coaster i've noticed lately is the dow industrials. watch that first drop, it is a doozy. but i was talking recently to a historian who pointed out the two biggest developments in roller coasters, the modern steel roller coaster used everywhere in the world, and the log flue ride, the one with the big splash at the end, were both designed here in silicon valley, and literally in a garage. the company called aero development created the modern roller coaster before computers. now, that historian has gathered up the details of that story and turned it into a documentary. kris rowberry's new movie premieres at the montgomery theater in silicon valley. the movie is "the legacy of aero development." thanks for being with us. now, i want to point out your movie's called "the legacy of aero development." you used to have a venture with an airship called airship ventures. you are horrible a