The invincibility of slugs

Matt Harvey has a poem on slugs,
ending thusly:
"listen chum, you are disposable
look at my thumb, it is opposable
unwelcome invertebrate
this might just hurt a bit
I pluck you and chuck you
into distant dew-drenched greenery
isn’t that mean of me?
slug, when all is said and done
you can  hide but you can’t run"
.
But the slug always has an answer.

Slug-chucker,
I mock your expert fling
My slime so loves your thumb,
I land in the muck at your foot.

You have no choice but' kill me.
And I will fill your lily livered,
liberal dreams
with guilt.

(c) Rlawson 8.6.10