This is a feel good situation that could have been a completely horrible situation. In this CCTV footage, this mail courier promptly saved a dog's life within a matter of seconds.

Watch as he gets off the elevator, walks past the dog and notices that the dog's leash is in the elevator that is going up.

He jumps in front of the dog and grabs the leash so that the dog doesn't get pulled up. He has assistance from another bystander and the dog's life is saved!