Don, keeping my mind busy would be IMPOSSIBLE when this drowsiness stage hits. I have fallen asleep at the computer, at the sewing machine, I sleep in chairs in the mall, on street benches, behind the wheel of a car, in mid sentence at the table, etc. I fall asleep working a crossword puzzle. For me, the only way I can remain awake is to be on my feet. I am asleep before I know I have hit the drowsy stage..........this is NOT the same thing as dozing off while watching television........it is a different mechanical/chemical/whatever response than just simply dozing off. If I am awakened prior to this stage completely passing, I am groggy, slightly disoriented.........akin to be awakened from a sound sleep at 1 am in a strange hotel room (only to find that someone was calling the wrong number!).