RollerCoasting

Demonstration: https://youtu.be/3Aek-H1xRdc

It's basically a glorified figure-8 track where you drive through the first half and freewheel through the second half, rinse and repeat two more times. It was originally going to be a generic circuit track, but I accidentally ended up making a track that basically functions like a roller coaster in real life. I think I like how it turned out.