just waiting

Noah: Mommy, I'm pooping. You need to come up when I'm done.

I go upstairs as instructed and stand waiting.

Noah: Mommy, I a little slipped and almost fell.

Mommy: Don't worry. You can't fall in.

Noah (glancing to the side in deep thought, allows about 15 seconds to pass. Then with a big sh*t-eating grin on his face inquires): But what about my head?