The dog was saved, unaware how close she'd come to death.
"The whole time, I could hear the owner just screaming," Mathis said. "When she came back down, she was just bawling her eyes out. She was really, really shaken up. She hugged me. She was just so thankful."
Mathis said someone else was in the elevator with their floor selected when the dog's owner entered, so she had little time to stop the carriage after realizing the dog wasn't inside. That, along with being new to an elevator-equipped building as a pet owner, likely contributed to that near-fatal error.
Fortunately, her new neighbor was there to help.
"She loves the dog a lot. It’s just one of those things. It took just a second," Mathis said. "I’m thankful I did not freeze up. I’m glad I reacted, and I’m glad that dog survived. Dogs are family. I know what that means."