graeme finlay , 53 , insisted he acted in self-defence after being attacked by ron phillips , 70 , wielding his crutch .
the 16-stone british gas engineer , who was travelling alone , confronted mr phillips and his wife june , 69 , about their rudeness in ignoring him when he joined their table for dinner , a court heard .
the couple were knocked unconscious after he allegedly assaulted them outside their cabin .