Make sure one is a match!
or
Two. One to take out the bulb and drop it, and the other to try and sell it before it crashes (knowing that it's already burned out).
or
The owner got tired of the (w)hole business!
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The barman says "I'll serve you, but don't start anything"
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How dare you be so intolerant! So what if the light bulb has chosen an alternative light-style?
or