Throw me for a Loop (or twenty)

Synopsis:
An amusement park thrill ride involving a transparent tube a meter or three in diameter and hundreds of meters long, with hills and loops more tangled than a roller coaster, for one person at a time, magnetically launched and guided, every few seconds.

Details:
Arriving at the amusement attraction, where the sign asks, "Did you remember to skip lunch?", you face a choice of lines. Do you want the freefall ride in the three-meter tube, or the chute-suit ride in the one-meter tube? Let's assume you boldly choose the freefall ride. The attendants begin to fit you into your riding harness. This consists of two large rings, one that goes snugly around your upper chest and under your arms, the other goes snugly around your pelvis area, and three or four struts connect the rings. You walk over to the mouth of the three-meter tube, a dark hole in the ground, and the attendants momentarily plug two things into each ring. They hit a master switch, and each ring is given both a jolt of electric current and a shot of liquid nitrogen; you are now wearing two strong superconducting (insulated!) magnetic coils that are attracting each other, but the struts keep them apart, and your overall field is similar to a bar magnet. This magnetism is guaranteed to last for the duration of the ride, which you now begin by diving into the hole.

Meanwhile, you were able to watch the cowards in the other line getting into their chute-suits, which also features magnetic coil rings and struts, but also includes a third ring for the feet (clamped onto shoes not unlike skis), and is constructed so that the rings are one meter in diameter. They dive into a funnel that quickly becomes their ride's one-meter tube.

Falling in the three-meter tube, sensors detect the orientation of your magnetic field (in case you jumped in feet-first), and powerful magnetic pulses are applied, to make your fall curve toward the launch zone. You then become the bullet in a coil gun, being shot upwards hundreds of feet. The tube ends! You freely fly ballistically toward the next part of the ride, where the three-meter tube begins again, and more magnetic pulses cause your path of motion to curve wildly, following the layout of the tube system, through more underground sections, through underwater sections, through corkscrew loop-de-loops and more coil-gun ballistic shots. When at altitude you can see the spaghetti-like tangle of the two rides, and people moving at various points in the tubes. Those in the one-meter tube vaguely resemble canisters in a pneumatic delivery system, especially when seen from altitude, but you know they are being magnetically propelled also (no way to add air pressure between two people without slowing one of them down). When you catch glimpses of people tumbling in the three-meter tube, you try not to think about your own handy/mandatory barf bag....