Three years ago a ride on a popular roller coaster ended in horror for a grieving mother and father. Christopher Hawley was at Six Flags Magic Mountain in California, celebrating his younger brother's high school graduation with their cousin. The 22-year-old collapsed moments after stumbling off the X2 roller coaster. His brother Alex tells Inside Edition he's still haunted by Christopher's final words. Parents Anne and William are now suing the amusement park which denies the allegations.