Algodoo

that was cool i geuss, but it wasnt amazing

just incase you didn't see my response on my project.Yes I know how it works and I know this works because it's hinge goes so fast that it flys out of controll using the loop de loop as a way to controll its movment.

uh, liphttam, I'm afraid you're wrong there. this works purely with the principle of centrifugal force (A.K.A. centripetal force). thats how things loop the loop in real life. and how you don't fall out of a roller-coaster when it goes upside-down. things are forced outwards when they spin.