Authorities say no one was injured after a truck burst into flames on a Mid-Michigan interstate.

It happened Tuesday afternoon on northbound I-75 at the Saginaw Road exit.

Michigan State Police said the driver of the truck, a 61-year-old Mt. Morris man, suffered a medical emergency.

He struck another vehicle before leaving the roadway and rolling the truck.

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Johnna Dalton said she can't describe what crossed her mind when she saw a man stuck inside the burning truck.

She was with her mother at the time and said they felt they had to do something.

"We seen that there was two cars stopped already, but nobody was like getting out and actually getting him," Dalton said.

Dalton said the man in the truck didn't appear to be injured, but was acting strange. Upon further inspection, she discovered he was diabetic and appeared to be suffering from diabetic shock.

"He was frozen when he was in the truck. He wasn't responding to anyone. We asked him if he was OK, he wouldn't respond to us," Dalton said.

Eventually, Dalton said others did come to help. A nurse and another passerby helped them pull the man from the vehicle.

The Zilwaukee Fire Department arrived a short time later to put out the flames.

Dalton said she is glad she and her mother were able to react in time. She wants to encourage others to do the same if they find themselves in a similar situation.

"If you see an accident on the side of the road and there's nobody getting out of it, I would definitely go and take the initiative," Dalton said.

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