Roller coaster engineer Korey Kiepert answers the internet’s burning questions about roller coasters and their designers at WIRED. How do roller coasters work? Who invented the first roller coaster? How are roller coasters tested? What is the tallest and fastest roller coaster in the world? How do they stay on the rails while doing loops and hurtling down the track? Engineer Korey Kiepert answers each of these questions and many more on Roller Coaster Support.

Director: Jackie Phillips
Camera: AJ Young
Editor: Richard Trammell
Talent: Korey Kiepert
Production Manager: Joseph Buscemi
Associate Producer: Paul Gulyas
Production Manager: Peter Brunette
Production Coordinator: Rhyan Lark
Casting producer: Nicholas Sawyer
Cameraman: Lucas Vilicich
Sound engineer: Paul Cornett
Production Assistant: Lauren Boucher
Postproduction Manager: Christian Olguin
Postproduction Coordinator: Ian Bryant
Managing Editor: Doug Larsen
Additional Editor: Jason Malizia; JC Scruggs
Editorial Assistant: Billy Ward

The photo of Gold Reef City was taken by NOLWEEN and used under the Creative Commons 3.0 license: https://creativecommons.org/licenses/by-sa/3.0/

The photo of the Wildcat Coaster was taken by WILDCAT1 and released into the public domain by the author.