Fake errands I've come across (and I won't admit which I fell for):

Go to the boiler room and ask for a bucket of steam.

Go to the stores and get me a new bubble for the spirit level...(at the stores) Does he want a round bubble or a square one? Dunno. Well go back and ask him...(back at the site) Stores know I want a round one, did you say it was for me?Hurry on back and stop wasting my time.

Go down to the post office and get three verbal agreement stamps, we need one for each copy.