One of the valley’s most wicked roller coasters, which lifts through the roof of the casino, drops through a tunnel at speeds of 90 MPH, then goes into a second drop — a 155-foot-tall spiral. Must be at least 48 inches tall. $8. F-Su, noon-10 pm. www.primmvalleyresorts.com. Buffalo Bill’s in Primm, 702.697.7433.