Not trying to be argumentative, but once you power down, just get up and leave.
Why do you have to wait until it completes its command?
I know we all have our ways, is it just a habit or is there a technical reason?
Because computers have to finish their business before they have their power cut off or they complain on the next start.
RE: Why do you have to wait until it completes its command?
I know a guy who wanted to make ABSOLUTELY sure his computer is powered down before he leaves.
REASON: His hard disk crashed because of a power surge when he forgot to power down his computer one night.