WATCH: Dramatic rescue of woman falling on Boston subway tracks

A 44-year-old woman is lucky to be alive after falling on to the tracks inside a Boston subway station earlier this week.

Surveillance video released by the Massachusetts Bay Transportation Authority (MBTA), shows a woman who appears to be unaware of her surroundings walking off the platform and landing onto the tracks of the Back Bay station.

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A group of bystanders quickly came to her rescue, jumping down and lifting her off the tracks. The incident happened Tuesday just before 9 p.m.

An MBTA spokesperson told the New York Daily News the woman was taken to a local hospital, after complaining of  pain on her right side. The spokesperson said it was unclear if the woman was suffering a medical emergency, intoxicated, or briefly disorientated.

The woman also managed to avoid the deadly, high voltage third rail when she fell.