Watch as this video shows a trailer begin to whip and eventually roll over. It's one of the worst nightmares for any driver pulling a boat or trailer.
It nearly happened to me towing a boat to Lake Shasta on I-5 through the Siskiyous. It's a lesson I'll never forget.
Several factors can cause this to happen including speed and not enough weight on the tongue of the trailer.
New Jersey Police say no one was hurt in this crash.