Skyline Attractions’ first steel turnkey roller coaster was the compact Harley Quinn Crazy Coaster at Six Flags Discovery Kingdom in Vallejo, California, USA. The vertical figure-eight-shaped ride offered high thrills in a small package, sending an elongated train of passengers through back-to-back Immelmann inversions as the opposite end of the train careened past.

Harley Quinn Crazy Coaster was the first generation of our Skywarp roller coaster. The product has since been succeeded by Skywarp II.