Or how about a ride like FoF, only it goes outside the building, then back in the building.
And instead of LIM launch, they use a catapult like the TTD.
I also have articulated some plans for a coaster that jumps off track and then back.
See, with an LIM launch, we create enough inertia to carry us at 50 MPH to the point of the jump. At the end of the track, there will be another, more powerful, LIM system to launch the coaster, and at the other end there will be a giant magnet, pulling the coaster back to the track, and then turning off the electromagnetism to let the ride continue.