Boa Constrictor

Below is the poem Boa Constrictor by Shel Silverstien. What do you like about the poem? Which craft moves do you like the best? What do you think the author was going to say for the last line of the poem?

Boa Constrictor
Oh, I'm being eaten
By a boa constrictor,
A boa constrictor,
A boa constrictor,
I'm being eaten by a boa constrictor.
And I don't like it -- one bit.
Well, what do you know?
It's nibblin' my toe.
Oh gee,
It's up to my knee.
Oh my,
It's up to my thigh.
Oh, fiddle
It's up to my middle.
Oh heck,
It's up to my neck.
Oh dread,
It's upmmmmmmmmmmmmmmfffffff.