>> the train hit the trailer pretty much dead center in the middle of the trailer. >> the train lifts the 18-wheeler off the ground and shears off the rear axle. >> the trailer got split in half. it went through the air like a frisbee. stuff was going everywhere. >> the massive collision is caught on camera by benjamin, who also videotapes trains as a hobby. he inherited his love of trains from his father jim who, in turn, got it from his dad. >> when i was small, my father and grandfather would take me to the train tracks in greensboro and once he started getting a little bigger and we started going outside the tracks and watching trains and he got interested and started filming and taking pictures of them. >> on the day of the collision, father and son head to one of their favorite spots to train watch. a railroad crossing by a recycling transfer station. while dad waits in the car, the young train buff walks to the other side of the tracks and starts recording a