I've been here,
once or twice,
too many times.

It's a sound I've heard before,
but I'm not exactly sure.

Maybe I haven't been.

I'm standing on my head,
at the bottom of a swimming pool.
It's really not that hard but I pretend I can't do it.
Then I start choking on the water,
I've been under too long,
I've been sleeping,
and you should never sleep underwater.