BOSTON -- One of the people who helped avert a tragedy on Massachusetts Bay Transportation Authority tracks when a woman fell is describing how it all unfolded.

Bill Lynch, of Holbrook, an usher at the Boston Garden, was waiting for a train at North Station Friday night when he saw a young woman fall into the pit.

He said that he started calling out to the 26-year-old woman.

"'Get up, Get up,' and she just fell into the middle of the tracks, the two tracks. There was just nothing else I felt I could do. I didn't know if she was living or dying at that point," Lynch said.

Lynch and other bystanders frantically waved their arms to alert the train operator.

"It was a hard thing to see," Lynch said. "I was trying to stop the train to get her attention."

He said that he could tell the operator was going to slow the train down.

"When she got there, I just pointed to the girl in the middle. Her head was covered (by the train), but when she got up, I couldn’t believe it. I said, 'Wow. That is incredible,'" Lynch said.

Lynch gives all the credit to that operator, who was able to stop the train in the nick of time -- saving the woman's life.

"I thanked the train driver for stopping, because if she didn't, she didn't have a chance," Lynch said.

When the woman got out of the pit, Lynch said she said, "I just slipped."

"The policeman asked her if she had a few drinks, and she said, 'Yeah, I had a few drinks,'" Lynch said.

After the train pulled into the station, and the woman was safe, Lynch said he boarded the train to go home, but that he missed his stop because he was "too upset."