Should I start eating ginkgo??

My smart cells are going to the little one in my belly. My own store of smart cells seems to be depleting. Case in point:

I got into the lift today at the 12th floor, intending to go down to the ground floor so I could get lunch. When I got in, I started jabbing at the button labelled "12"  and wondering why the hell it did not light up. 

By the time it dawned on me that I WAS on level 12 going downstairs, the rest of the folks in the lift were staring quizzically at me. 

I didn't know where to hide and just shuffled silently to a corner.....so embarrassing!