Blue Heaven (The Pogues)

"Aligators snap at your ankles
And branches snap at your brain
If I ever get through this swamp alive
I'll never more pray for rain

Atlantic Blue Crab

This must be the place, and still
It somehow don't seem right
Something in the moon
Could change these endless days
To lonely nights

I take a stroll down by the sea
And walk along the pier
Then I slip and hit my head
-Now's the time to fear

See the surface, see the rocks
See my past fly swiftly by
I feel the water in my lungs
And wake up screaming for my life..."

-The Pogues
From: "Blue Heaven"

I don't get it. What's this all about?