For 25 minutes, a Canadian truck driver in Edmonton, Alberta drove into oncoming traffic at excessive speeds, clipping oncoming vehicles and sending others off the road before crashing into a rail, hurdling over an abutment then crashing and exploding onto the train tracks below.

The media footage was captured by an eyewitness’ video camera. United Press International reported that the man may have had a medical condition which contributed to the horrifying incident.

A witness of Monday’s afternoon crash described the driver to reporters as looking “mad,” “angry” and “zoned out. He was basically slumped down, head down, bobbing around, arms hanging down at his side,” Dave Hybeck told FOX News.

The driver, identified as 25-year-old Mark Santos, was an insulin-dependent diabetic and the driver’s brother, Jordan Santos said he’s been around his brother when he’s gone into hypoglycemia and he would be confused and sleepy.

The Edmonton Police are investigating the accident and an autopsy is scheduled later in the week.