He's running late because he was stuck in the elevator in the parking garage.
He's been kidnapped by aliens, but they let him go after he promised to attend.
He's in an emergency meeting with the CEO of his cat, Mr. Whiskers.
He's been possessed by a mischievous spirit that only responds to "Meetings? Ugh, no thanks."
He's on a top-secret mission to save the world from certain doom, and he just can't be bothered with this meeting.