Kim Kardashian, Kanye West, Kendall & Kylie Jenner at 'Six Flags' theme park (July 17th)

Photo Gallery by QuickGallery.com What started out as a fun trip to an amusement park took a dramatic turn when Kim Kardashian broke down in tears while riding a roller coaster with her sister,Kendall Jenner, and her boyfriend, Kanye West, at Six Flags Magic Mountain Amusement Park in Santa Clarita, California on Tuesday (July 17). After safely getting back on her own two feet, the "Keeping Up with the Kardashians" star tweeted a picture of herself from the ride which shows her mouth wide open, her eyes glues shut and her hands gripping the harness and - although the ride caused Kendall's long locks to whip around - Kim's coif stayed neatly held together in a high bun.