[Jon Mendenhall] fixed this deficiency by designing a model roller coaster that accurately simulates a full-sized ride. The track and cart are all made of 3D printed pieces, which altogether took ...

An curved arrow pointing right. This thrill-seeking ride is called The Joker. This roller coaster spins you 360 degrees and hangs you outside of the track, producing a sense of free-falling.

Passengers on a roller coaster in Ocean Park had to walk away from the ride after a safety device stopped it moments before they climbed a loop for a full thrill-charged ride. The park said the ...