Yes Smiley

Apparently Bill Gates did that too !

http://www.vanityfair.com/business/features/2011/05/paul-allen-201105

I'd occasionally catch Bill grabbing naps at his terminal during our late-nighters. He'd be in the middle of a line of code when he'd gradually tilt forward until his nose touched the keyboard. After dozing for an hour or two, he'd open his eyes, squint at the screen, blink twice, and resume precisely where he'd left off—a prodigious feat of concentration.