BOSTON -- Two days after a runaway freight car slammed into a commuter train injuring dozens of people, the emergency calls made by the train engineer were released and he spoke about the crash.

Engineer Recounts Crash | Emergency Calls Released

On Tuesday afternoon, a freight car came loose from a lumberyard and rolled onto a commuter rail, directly into the path of MBTA train No. 917.

"There is a boxcar coming right down on top of me!" commuter train engineer Ronald Gomes radioed to a dispatcher at Boston's South Station. "Is it OK to back up or try and make the stop here? It looks like the car got loose ... Answer me! Can I back up? It is going to come right on top of us ... Hey, I'm backing up!"

Moments later, the freight car slammed into the Stoughton-bound train near Canton Junction, injuring dozens of the 300 people on board, including Gomes, 61.

"I remember that thing coming at us, and making the calls on the radio and thinking, 'I better get out of here.' And I get out of the seat and that's when it hit. The next thing I remember is picking myself up of the floor," Gomes told NewsCenter 5 on Thursday.

After getting up off the floor, Gomes grabbed the radio and called for help.

"Emergency! Emergency! Emergency ... 917 emergency!" Gomes radioed after the impact. "The car just crashed into us. Please send medical assistance."

Dispatchers from the Mass Bay Commuter Railroad immediately contacted the Canton Fire Department.

"A boxcar came off the Stoughton branch and hit one of our commuter trains as it was operating. So, it looks like we have a train and boxcar that collided right on the main line at Canton Junction. I don't know what the injury extent is right now, but the engineer is calling for an emergency. But we will definitely need paramedics out there," the dispatcher said.

About 150 passengers were treated at the scene, and 80 of those were sent to area hospitals with minor injuries such as bruises, neck and back problems or facial cuts.

An employee from the Cohenno Inc., lumberyard called Stoughton police at about 5:10 p.m. Tuesday, warning of the runaway freight car on the commuter rail tracks.

"This is Cohenno Inc., down on Evans Drive. The freight car's out on the commuter rail here. The freight car went out on the commuter rail. We got to stop the commuter train," the caller warned. "The freight car is sitting on the tracks. We gotta stop -- somehow -- we gotta get the MBTA to stop the commuter rail."

Fifteen minutes later, the car collided with the train three miles away.

Gomes was treated for non-life-threatening injuries and released from the hospital the next day. On Thursday, he was reluctant to call himself a hero.

"I don't know about that. You get in those situations, and you just do what your natural instincts tell you to do. I have been doing this for 40 years, and I have a lot of training and you just do what you do," he said.

Gomes credited his crew for staying calm and helping passengers after the crash.

Federal and local transportation safety officials were investigating the actions of company personnel, inspecting the car itself and the tracks where it was parked. Bradford Cohenno, the company's president, told NewsCenter 5 that the brakes on the freight car let go.