The Princess Bride - Pg 85

   "Princess," the Sicilian called, "Do you know what happens to sharks when they smell blood in the water? They go mad. There is no controlling their wildness. They rip and shred and chew and devour, and I'm in a boat, Princess, and there isn't any blood in the water now, so we're both quite safe, but there is a knife in my hand, my lady, and if you don't come back I'll cut my arms and I'll cut my legs and I'll catch the blood in a cup and I'll fling it as far as I can and sharks can smell blood in the water for miles and you won't be beautiful for long."