100: One to do it and ninety-nine to say "I could've done that."
or
Bike helmets don't fit hippos
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Seven. One to install the new bulb and six to figure out what to do with the old one for the next 10,000 years.
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Snow balls!
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When it came time to pay, the skunk didn't have a scent, the deer didn't have a buck so they put the meal on the duck's bill.
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6: 2 to screw in the bulb and 4 to testify that it was lit from the moment they began screwing.
or