Downright terrifying. He's lucky to be alive. 

via the YouTube uploader:

Out for a group ride. I had never met the guy who was riding the ZX-10 before. As I was slowing down he was still going fast and said he never saw the trailer. The gopro camera is mounted to the front of my Ducati 848 Evo. He survived the crash with only a broken arm and broken leg however he was airlifted to the hospital.