Police in Maine say a golf cart accident caused injuries so serious that a LifeFlight helicopter was summoned. The Cumberland County Sheriff’s Department says 52-year-old John MacKay from Sanford was thrown from the golf cart that was being operated by a Massachusetts man Saturday night in the town of Casco. MacKay was in critical condition Sunday at Maine Medical Center in Portland. Deputies arrested the golf cart operator, 59-year-old Gary Belinsky from Westford, Mass., for drunken driving. He was released Sunday morning on $300 bail from the Cumberland County Jail. Jail paperwork didn’t indicate if he’d hired an attorney, and the phone at his Massachusetts home rang unanswered Sunday.