Boston (CNN) - A Massachusetts pit bull saved her owner from an oncoming freight train, risking life and limb, to pull her off the tracks.

The woman survived, but the dog is severely injured.

David Lanteigne has adored this pit bull since recuing Lilly from a shelter to be a companion for his mom who suffers from alcoholism.

"We saved her life and she saved my mom's life," he said.

It was midnight last Wednesday when his mom fell unconscious on train tracks in Shirley.

"Lilly was either pushing or pulling my mother off the tracks," said Lanteigne. "There wasn't enough time and that just prior to the train making impact Lilly had intentionally gotten between the train and my mother and had taken the hit."

The entire hit. Eight-year-old Lilly suffered severe trauma. David's mother was uninjured.

[Reporter]: "Will this dog be able to walk again?"

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