A sunburnt zebra.
or
It saves time in the long run.
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I just can't think of one atm.
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It broke the law of gravity!
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The neutron says "Are you sure?" The proton replies "I'm positive."
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Two. One to take notes while the other screws it into the faucet.
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Bar magnets have poor homogeneity.
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The entire team! And they all get a semester's credit for it!
or
it was a shitzu."
or