A motorist’s dash cam captured footage of a semi truck wobbling and regaining balance several times, before finally overturning on a curve on Interstate 80 in western New Jersey.

“I was driving to the Poconos. I was on the interstate headed west. I was about to pass a truck driver, but he was wobbling so much that it wasn’t very safe,” said the motorist.

In the clip, the semi truck can be seen ahead of the motorist in the center lane.

The truck then approaches a curve in the road and the trailer begins to lift of the ground, before the driver regains balance.

The curve continues and the semi truck sways again, this time the tractor trailer finally tips over and skids across the highway, sending up sparks.

The recording motorist then drives onto the grassy median to offer his assistance to the driver.

After the crash, the truck driver can be seen outside of his rig, surveying the damage.

“I called 911 right away and went outside to check on the driver. He was shaking but had no injuries at all,” said the motorist.

Watch the footage below.