CP Coal Train Breaks Apart !! Goes into Emergency Drone

This is what happens when you break an air brake hose on a Frieght train. It's a safety feature invented a long time ago. Note the front part of the train notices the sudden drop in pressure and applies the breaks on the front end immediately and automatically by dumping air. Note the second half of the train loses pressure from the lead locomotives and automatically brakes the rear of the train and both sections of the train do not collide together. Pretty cool engineering if you ask me. In this case a steel coupler broker under stress. The train is over two miles long and uses distributed power (locomotives remote controlled from the front of the train but located in the center).