Ronnie Ortiz-Magro shocked his fellow castmates with his unexpected arrest during the season premiere on Thursday of Jersey Shore: Family Vacation on MTV.Five days after Ronnie, 36, told all his friends that he planned on proposing to his then-girlfriend Saffire Matos, they learned that he was arrested for an incident involving her in Los Angeles.'These allegations, whatever happened, are pretty serious,' Vinny Guadagnino, 34, said to the camera. Season premiere:Ronnie Ortiz-Magro shocked his fellow castmates with his unexpected arrest during the season premiere on Thursday of Jersey Shore: Family Vacation on MTV'He needs to take time to himself and figure himself out.