Limericks, as you likely know, are generally humorous, and the subject here is not. While this structure may seem like an odd choice for this poem, I think the rhythm and rhyme of it add to the tale, and perhaps the chaos of the main character's situation.
When Kenny shot Charlie, no one was really sure how to react. It wasn't because it was all that surprising — Kenny had had it out for Charlie since day one — but we didn't know whether to rejoice at the end of a feud or dread whatever was coming next.
“Where’s my cannoli?” a little voice behind me says.
The rod of the pool cue glided back and forth between Martin’s slim fingers as he surveyed the field before him: the odds were not in his favor.
I was married, once. She was French. Her names was Inès, and I suppose I should have known that any woman whose name means “chaste” (especially if she’s French) is destined to live ironically.