Yesterday i was surfing with some friends who are just learning in knee high waves. I was letting them borrow old long boards while i rode my shortboard. I wanted to try riding a longer board cause the waves were smaller so i traded and long story shor my friend rode my board to close to the beach and broke a fin at the base of it. I know i will have to buy another set of fins but the problem is i cant get one half of it out. Ive tried everything from using plyers to trying to squeeze a knife under it but i cant get it. Any hints on how to get it out. Any help is appreciated thanks