Oliver’s Obsession

As soon as Oliver noticed the burnt-out bulb in the vanity mirror, he ran for the utility closet.
It was full of light bulbs. The obsessed Oliver hated burnt-out bulbs.
Just as he pulled out a replacement, the power went out.
That wouldn’t stop Oliver, however.
Feeling each bulb, he tried to tell which was burnt-out. But none felt warm.
He unscrewed each one, shaking it hard… no telltale jingle, either.
So Oliver sat on his bathroom countertop for three hours until the lights came back on.
They did. All of them. No burnt-out bulb.
He replaced them all, anyway.