Thank you for visiting Contra Costa Times. We are sorry the article that you requested is no longer available. Please search for this article in our archive search.

Related video on this topic

 
comments powered by Disqus
( Linda Zavoral )
Six Flags building The Joker roller coaster

How do you turn the eccentric personality of a comic-book villain into an extreme roller coaster? With 3,200 feet of purple and green track, a Zero G barrel roll, three inversions, 15 airtime moments -- and a 'step-up, under-flip inverted roll' that will result in riders going horizontal.