a limerick is a short, humorous, nonsense poem especially one in five-line anapestic meter with a strict rhyme scheme. The first two lines rhyme with the last line and the third and fourth line rhyme, and they are usually shorter.
a caffeinated life
I've reached beyond those limits that bound
And searched around ‘til I finally found
The Pinnacle of Reality
Is in my utter mortality
And so what I've found is simply the ground