A Massachusetts man was arrested on a charge of operating a golf cart under the influence of alcohol at a Sebago Lake resort after his passenger fell from the cart, sustaining life-threatening head injuries Saturday night.

The Cumberland County Sheriff’s Office said Gary Belinsky, 59, of Westford, Mass., was driving a golf cart on a paved road at Point Sebago Resort in Casco shortly before 10:30 p.m. with a group of other golf cart drivers.

Passenger John MacKay, 52, of Sanford fell from Belinsky’s moving cart and hit his head on the pavement, said Capt. Shawn O’Leary of the Cumberland County Sheriff’s Office.

The group called for help, O’Leary said.

O’Leary said deputies are still trying to determine how MacKay fell from the cart, which was not equipped with seat belts. O’Leary said it does not appear that the carts were traveling at unusually fast speeds.

MacKay was flown to Maine Medical Center in Portland. He was in critical condition at the hospital Sunday night.

O’Leary said under Maine law it is illegal to operate any motorized vehicle under the influence of alcohol. 

Belinsky was arrested and taken to Cumberland County Jail. Bail was set at $300.