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

  8. "Whew! Guess I left the top off the white-out. You probably got here just in time!"

  7. "I wasn't sleeping! I was meditating on the mission statement and envisioning a new paradigm."

  6. "I was testing my keyboard for drool resistance."

  5. "I was doing a highly specific Yoga exercise to relieve work-related stress. Are you discriminatory toward people who practice Yoga?"

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

  3. "The coffee machine is broken..."

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

And the #1 excuse to say if you get caught sleeping at your desk.
  1. " ...... AMEN!"