Same here. I was told to count backward from 20...I remember saying 20, 19, 18...and then I woke up in recovery!
I had some surgery in November. They had me shift over from the gurney to the operating table, and the next moment (to me) I was waking up in recovery. No counting backward beforehand and no sense of elapsed time. I don’t know what anesthetic drug they used, but it worked fine.