Thank you Elders

A Catholic Priest, A Baptist Preacher, and a Mormon Bishop went fishing in a boat together. After awhile, the Catholic Priest ran out of bait. So he got up, stepped out of the boat, walked across the water to the shore, and returned the same way with more bait. Soon after, the Mormon Bishop also ran out of bait and did the same. Finally the Baptist Preacher ran out of bait and not wanting to be out done by the other two, stepped out of the boat and immediately sank down into the water. The others grabbed him and helped him back into the boat. As they watched the cold, confused Preacher trying to figure out why he could'nt do it, the Catholic Priest finnally laughed and whispered to the Mormon Bishop, "Should we tell him about the rocks beneath the water?" The Bishop, obviously confused, said, "What rocks?"