Top excuses if found asleep at your Desk...

"Oh, Man! Come in at 6 in the morning and look what happens!"

"This is one of the seven habits of highly effective people!"

"This is in exchange for the six hours last night when I dreamed about work!"

"Gee, I thought you (the boss) were gone for the day."

"They told me at the blood bank this might happen."

"Oh, Hi, I was trying to pick up my contact lens without my hands."

"This is just a 15 minute power-nap like they raved about in the last time management course you sent me to."

"Whew! Guess I left the top off the liquid paper"

"I was just meditating on the mission statement and envisioning a new paradigm!"

"This is one of the seven habits of highly effective people!"

"I was testing the keyboard for drool resistance"

"It worked well for George W., didn't it?"

"Just pacing myself for the all-nighter tonight!"

"I was working smarter-not harder."

"Auggh! Why did you interrupt me? I had almost figured out a solution to our biggest problem."

"I'm in the management training program."

"Someone must've put decaf in the wrong pot."

"Boy, that cold medicine I took last night just won't wear off!"

"Ah, the unique and unpredictable circadian rhythms of the workaholic!"

"It's okay... I'm still billing the client."

And the #1 response if found asleep at your desk:
"...and I especially thank you for my excellent boss, Amen!"