Now for something completely different: Famous Poems as Limericks! Here's my favorite:
There was a man who, at low tide
Would walk with the Lord by his side
Jesus said "Now look back;
You'll see one set of tracks.
That's when you got a piggy-back ride."
And you thought there wasn't a way to make "Footprints In The Sand" any more ridiculous, did you?
"The Raven" as a limerick is quite good as well.