Where's AJ?

So we were cooking dinner and cleaning house and other such evening activities when we heard the toilet seat go up. We looked around and didn't see AJ anywhere. I walk toward the hallway and find AJ (in the dark), shorts around his ankles, lifting the toilet seat. He paused, then turned a walked (shorts still around ankles) to retrieve a stool from in front of the sink. He carried the stool to the toilet, turned around, stripped from the waist down, and climbs up to sit on the toilet.

I walked to the bathroom door and asked if he needed the light on. He answered affirmatively and told me to go away.

In case you weren't paying attention....my little boy TOOK. HIMSELF. TO. THE. POTTY. WITHOUT. ASSISTANCE.

Happy dances and high-fives all around! This is HUGE, people!