The double-entendre title (manslaughter, man's laughter) is a brilliant idea. The prison imagery is really vivid and appropriately bleak and hopeless, and the narrator's ironic voice matches the subject.
It's also good that the poem ends before we find out what he did, because then he can stand as a representation of all prisoners in a way.

Wow, this is really good. I love the way you've made the idea of manslaughter and the jail cell discreet and subtle. I don't know what the technique's called - not personification - but I like the way you've given something that is not an inanimate object, like emotions, qualities of an inanimate object. Great job, the poem had a really good rhythm.

Well done


~Ian shwelster

This is an interesting poem. The second stanza is probably my favorite. Keep writing.

Aww, what an awsome poem!
I loved it :D

I love the first stanza and the lines "449 other animals./ crash!/ 448." Wonderful poem.