Only one. But he'll leave a big puddle of spit on the floor underneath him.
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It saw the ginger snap.
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Two. One to screw it in, and one to stab the other in the back and take all the credit.
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Because the teacher said it was a piece of cake!
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None. The darkness will cause the bulb to change by itself.
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Two — one to screw it most of the way in and the other to give it a surprise twist at the end.
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