What is a Bat Chain Puller?

Captain Beefheart’s Shiny Beast (Bat Chain Puller)
Bat chain
Puller
Bat chain puller
Puller, puller

A chain with yellow lights
That glistens like oil beads
On its slick smooth trunk
That trails behind on tracks, and thumps
A wing hangs limp and retreats

Bat chain puller
Puller puller

Bulbs shoot from its snoot
And vanish into darkness
It whistles like a root snatched from dry earth
Sodbustin’ rakes with grey dust claws
Announces its coming in the morning
This train with grey tubes
That houses people’s very thoughts and belongings.

Bat chain puller
Puller puller

This train with grey tubes that houses people’s thoughts,
Their very remains and belongings.
A grey cloth patch
Caught with four threads
In the hollow wind of its stacks
Ripples felt fades and grey sparks clacks,
Lunging the cushioned thickets.
Pumpkins span the hills
With orange crayola patches.
Green inflated trees
Balloon up into marshmallow soot
That walks away in forty circles,
Caught in grey blisters
With twinkling lights and green sashes
Uuh
Pulled by rubber dolphins with gold yawning mouths
That blister and break in agony
In souls of rust
They kill gold sawdust into dust.

Bat chain puller,
Puller puller.

So what the hell is a Bat Chain Puller?!?!?!