Sleeping Might Be Harmfull Sometimes

A wife awoke early one morning to the sounds of her husband angrily banging
around pots and pans in the kitchens.
When she goes downstairs, she sees that he is looking for something to eat
but, more importantly, is very upset about something.
"What's the problem, darling? Didn't your program work?"
"It worked. I wrote that code until the wee hours of the morning, and it
worked!"
"Then what's the matter? Where there are a lot of bugs in it?"
"I took special pains to eliminate the bugs. It worked, and it worked
perfectly!"
"So what's wrong?"
"I was so tired when I finished, I decided to take a little nap, just for a
few minutes."
"Did you not sleep well? Did you have a nightmare?" the concerned wife
inquired.
"No, I slept perfectly well ... with my head on the backspace key."