Last Trace Alive on Instagram: "On 16 September 2009, the Xcelerator roller coaster at Knott’s Berry Farm in California experienced a catastrophic mechanical failure when its high-tension launch cable snapped. As the train accelerated to its 82-mph launch speed, the 3/4-inch steel cable whipped through the air, sending metal shards and fiberglass debris into the front row of the ride. A 12-year-old boy, Kyle Wheeler, suffered severe lacerations to his left leg that required multiple surgeries an