http://www.Hevanet.com/bens/Rocket%20Ramp.lvl
I have taken Running-Armadillo's mine-shaft idea and done a never- ending spectator level. It's slow and not showy - just proof of concept.
I had a difficult time getting the rocket not to destroy itself and whatever it was connected to. I have taken steps to keep it fairly slow at key places. The advantage of this approach is NOT using the force.