our own bob riddell has a sneak peek. >> they are have the first ever bay area ex plane events. this was built in the '70s. if you had flown on a commercial aircraft, would you consider this to be pretty spacious. could you scoot over a little bit? just kidding. experimental aircraft, does that mean dangerous? >> absolutely not, not dangerous. >> what does it mean? >> it means people that built their own aircraft and fly them. sometimes it means the first time it has ever been made or created and other times it means it is a home build, built by the person who is going to fly it. >> this particular aircraft was built by a company. this is a one off meaning it was the first one or a prototype. >> the one we are sitting in is a prototype. the building of it, who is out of monterrey. >> very small person? >> actually, as big as us. i know, crazy. >> really? >> he built plans to it and sold plans to people who built this helicopter. >> if i can get out of it, it is almost like a rubik's cube. i need to be a con tore shunist. willie's mom here. you were the first woman to build her o