Drowning On Dry Land

The whole tune is great (especially Albert King's version) but this one part always makes me giggle:

"You know my mother told me the story,
about that lil' dog that couldn't see too well
He was crossing a railroad track one day,
when the train cut off a part of his tail
He turned around but never looked up, just to peep over the rail
And she said he lost his whole head
trying to find a little piece of tail"