A still image of the roller coaster project by Mike Brenneman, Winter 1995.

This project allowed you to build and simulate a roller coaster.  The
track design module (not shown) let you add curved sections, hills, and
loops.  You could then simulate the roller coaster (assuming you had
made a closed loop).  The simulation could be run with different levels
of viewing and model detail.  The picture shows the chase view of the
roller coaster as it crests the initial hill and is about to plunge
downward before entering a loop.