In the 38-second video that was captured by his building's security cameras and posted to Twitter by Mathis, he's seen arriving from work and parking his car in the complex's underground garage. He then took the elevator to the ground floor, where he lives. Upon exiting the elevator, he crossed paths with a woman and her Pomeranian, who was on a leash.
While the woman entered the elevator before its doors closed, the dog was still on the other side. Mathis was then seen leaping back to pick up the dog and separate it from its leash.
"When she got on, I was looking at the dog because it was a cute dog," he told CNN. "I noticed the leash was kinda long but I didn't think it wasn't going to make it on the elevator or anything."
When he noticed the Pomeranian didn't make the elevator, Mathis said he yelled back to the woman, "Hey, your dog!"
"Instinct just kicked in. I just grabbed that leash," he explained. "There was so much fur. That's why it took me a bit to get that lever off of the collar, and when I did, I let go, you could see that leash just shoot off to the top of the elevator."