Heh.  I can see thinking of Mangum as deranged.  He writes a pretty surreal-sounding song.

For me, it's the lyrics that make the music.  "Aeroplane" is a kind of meditation on the death of Anne Frank, along with lots of other people, and its stark imagery coupled with its rhythmical phrasing make for exciting reading, to my lights.  The lyrics go past their initial subject matter, into themes of rebirth, grotesqueness, a general inability to connect, and so forth.  Here are two of my favorites, both from the Aeroplane album:

In the Aeroplane over the Sea

What a beautiful face
I have found in this place
That is circling all round the sun
What a beautiful dream
That could flash on the screen
In a blink of an eye and be gone from me
Soft and sweet
Let me hold it close and keep it here with me

And one day we will die
And our ashes will fly from the aeroplane over the sea
But for now we are young
Let us lay in the sun
And count every beautiful thing we can see
Love to be
In the arms of all I'm keeping here with me

What a curious sight we have found here tonight
There is laughter that sounds from the trees.
There are lights in the clouds
Anna's ghost all around
Hear her voice as it's rolling and ringing through me
Soft and sweet
How the notes all bend and reach above the trees>

Now how I remember you
How I would push my fingers through
Your mouth to make those muscles move
That made your voice so smooth and sweet
And now we keep where we don't know
All secrets sleep in winter clothes
With one you loved so long ago
Now he don't even know his name

What a beautiful face
I have found in this place
That is circling all round the sun
And when we meet on a cloud
I'll be laughing out loud
I'll be laughing with everyone I see
Can't believe how strange it is to be anything at all

Holland, 1945

The only girl I've ever loved
Was born with roses in her eyes
But then they buried her alive
One evening 1945
With just her sister at her side
And only weeks before the guns
All came and rained on everyone
Now she's a little boy in Spain
Playing pianos filled with flames
On empty rings around the sun
All sing to say my dream has come

But now we must pick up every piece
Of the life we used to love
Just to keep ourselves
At least enough to carry on

And now we ride the circus wheel
With your dark brother wrapped in white
Says it was good to be alive
But now he rides a comet's flame
And won't be coming back again
The Earth looks better from a star
That's right above from where you are
He didn't mean to make you cry
With sparks that ring and bullets fly
On empty rings around your heart
The world just screams and falls apart

But now we must pick up every piece
Of the life we used to love
Just to keep ourselves
At least enough to carry on

And here's where your mother sleeps
And here is the room where your brothers were born
Indentions in the sheets
Where their bodies once moved but don't move anymore
And it's so sad to see the world agree
That they'd rather see their faces fill with flies
All when I'd want to keep white roses in their eyes