I Don't Understand Songtext

Suppose it's what you feel
you'll never know

That's what I don't understand
that's what I don't know

Now I'm awake
I leave the light on
and take a swim
beneath the rocks and undertow
I try to scream
I don't remember where I've been
a trampoline
another lack of oxygen

Suppose the feeling's real
you'd never know
suppose it's what you feel
you'll never know
I open my mouth but there's nothing
to swallow down
I'm scratching my face like there's something
further down
It's like a drug
I turn the light off
and pull the plug
but still it always comes back on
Suppose you change your mind
and back again
suppose you had more time
and adrenaline.