This reminds me of a joke. A scientist is conducting tests on some frogs. He removes a frog's left leg, shouts "jump!", and the frog jumps to the left. He writes down "remove frog's left leg, frog jumps left." He removes a frog's right leg, shouts "jump!", and the frog jumps to the right. He writes down "remove frog's right leg, frog jumps to the right." He removes both legs on a frog, shouts "jump!", and the frog doesn't jump. He writes down "Remove both legs, frog goes deaf."

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UPDATE: Oh, never mind, I misread what you were trying to do. Still kind of a funny joke though.