Have you seen that very annoying Capital One bank commercial? People are playing tennis and dancing, etc etc, while a guy in a suit is behind them with his hand in their back pocket. The little jingle keeps singing "hand in my pocket hand in my pocket hand in my pocket!" over and over and over again. I've had it running through my head for days now and it won't go away. It's driving me up the wall! I'll start humming it or mumbling it without even realizing it. Also, yesterday I was reading through old papers and I did a whole bunch of Sudokus. This morning I woke up with images of rows and column of numbers that I was trying to figure out. Obviously I have an excess of space in my head that is desperate to be filled.