NYC subway shooting witness wondered after escape: 'Is the shooter still with us?'

Kenneth Foote-Smith was on the subway to work when a gunman detonated a smoke canister, sending commuters into panic.

Kenneth Foote-Smith was on the subway when a gunman detonated a smoke canister, sending commuters into panic.

He saw women screaming and "banging on the door," and a man trying to open the subway car door, "fighting for his life."

"That's when I knew something was very, very wrong and that's before the gunshots even happened," Foote-Smith told ABC News' "Good Morning America."

Ten people were shot by a gunman on a Manhattan-bound N subway car during the Tuesday morning commute as the train approached the 36th Street subway station in Brooklyn's Sunset Park neighborhood, according to the New York City Police Department.