A friend of mine came along on a Caribbean dive. He was buddied with his wife but went in ahead of her, following the mooring down to the bottom. He snagged a large fish hook that was tangled into the mooring line. The hook buried itself deeply into the meaty part of his thumb. His wife was delayed on the boat, she never even got into the water. He was alone and with no cutting tool. Fortunately, he was able to untangle the mess of fishing line from the rope, but it took him twenty minutes to do so. Even back on the boat he was unable to get the hook out of his hand; he needed to have it cut out at a local hospital ER.