a blank
When you're so blank you don't even know your own name, let alone what's going on in your own brain.
My friend asked me what I wanted for lunch and I just stared at the ceiling like it was giving me life advice.
My dog barked at me for 10 minutes and I still didn't move. It was like I was in a trance.
I got a text from my crush and I just blinked like I had just been hit by a car.