"Initial reports are that he was standing too close to the edge of the platform with his back to the tracks" when the victim was struck around 5:30 p.m. at the Kingsland Station, NJ Transit's Jim Smith said.
The Woodside, Queens man was rushed to Hackensack University Medical Center in critical condition, Smith said.
"His back was facing the way the train came, with his headphones in," a witness said. "He just didn't see it....People are tweeting suicide and trespasser and it wasn't either."
Area trains were running up to a half-hour behind, Smith said.
NJ Transit police were investigating, he said.
The No. 55 Main Line express train had left Hoboken for Port Jervis at 5:15 p.m., Smith said.
Click here to follow Daily Voice Saddle Brook-Elmwood Park and receive free news updates.