A Pig as a Metaphore for the Earth

Gentle Readers,

[Homer and Bart are chasing the rolling rotisserie pig. It rolls through some bushes]
Homer: It's just a little dirty! It's still good, it's still good!
[the cart falls off the edge of a drainage culvert, and the pig floats down the stream]
Homer: It's just a little slimy! It's still good, it's still good!
[the pig reaches a dam at the end of the stream and plugs the drain hole. The water pressure builds up behind it, until it launches out of the hole into the air]
Homer: It's just a little airborne! It's still good, it's still good!
Bart: It's gone.
Homer: I know.

Thanks BP.