An off duty cop rushed to the aid of an injured trucker in Utah on Monday after police say the driver dosed off.

The accident happened on the afternoon of August 27th in David County, Utah.

According to Fox 13 Now, the semi truck was traveling on Interstate 15 near Centerville when it drifted out of its lane and struck the left guardrail, sending the rig drifting right across all lanes of traffic before eventually leaving the roadway and overturning.

The semi truck came to a stop near the FrontRunner train tracks, close enough so that the wheels were jutting into the path of an oncoming train which struck the semi truck, damaging the rig and trapping the driver inside, and that’s when off-duty West Valley City police sergeant Kevin McLachlan drove by on I-15 and realized something was terribly wrong.

“I pulled over, ran over to the scene,” he said.

“The driver, we could see through the windshield of the semi, he wasn’t very responsive…”

Another truck driver who stopped at the scene then climbed inside the cab to help the wrecked driver, and that’s when the oncoming train came into sight.

“I never heard the train coming,” McLachlan said. “It sounded like an explosion.”

McLachlan was thrown several feet upon the train’s collision with the semi truck and suffered a scratch above his eye, but miraculously no one else was hurt in the collision.

“Moments prior to the train hitting the semi, myself and two of the other citizens had been on that side, standing on the truck, assisting Mr. Baker [the second truck driver] in getting inside the cab to get to the driver track,” McLachlan said.

“It was just a miracle nobody [else] was injured.”

The truck driver was transported to a nearby hospital with non life-threatening injuries and his dog, who was also in the truck at the time, has been described as “doing fine,” reported Good 4 Utah.

“While it was not on the alignment per se, one of the trucks tires/wheels was jutting out far enough to make contact with a southbound UTA train,” said the Utah Transit Authority.

Troopers say that they believe drowsy driving was a factor in the initial tractor trailer crash.

“I’ve never almost been hit by a train on my way to work, that’s for certain,” McLachlan added.