>> and i began thinking about what i was really doing chasing this guy who was so committed to putting an end to my life. we took off again. >> but officer perry's car is barely able to accelerate due to the damage, and he watches as the men speed off. >> we were all running emergency mode trying to figure out where this is going to get stable enough that we can assist chuck. >> after two terrifying encounters alone, backup is on the scene. his cruiser is breaking down, but officer perry remains relentless in his pursuit. ahead, the harrowing chase is coming to a dramatic conclusion. >> the most amazing crash i've ever seen. the car went up about 15 feet in the air. it spun sideways and did a barrel roll, at the same time