Thirty-Five Thousand Feet of Despair Lyrics

Another moth disintegrates
Hovering in the beam
Of a searchlight

That's looking for a trace
Of a plane
Whose pilot, it's a shame
Has gone insaneFlaming Lips - Thirty-Five Thousand Feet of Despair - http://motolyrics.com/flaming-lips/thirty-five-thousand-feet-of-despair-lyrics.html

You can see the silhouette
Across the moon
He hung himself mid-flight
In the bathroom

Why is it so high?
Why is it so much?