Like most places of employment, my work does not have assigned parking. But everyone parks in the same dang places every day, and they (quite mistakenly) come to think of that spot as THEIR spot. Well here in the beautiful Pacific Northwest of the US, we get much rain. Much, much rain. And the rainy season has started -- it is Fall, ya know. And it is dark late into the morning. In the middle of winter we arrive at work in the dark, and leave in the dark. (Yes I know you Nordic/Alaskan/Canadian/Russian PFers are not going to feel much sympathy for me on this point!) So I have this coworker who has shifted his work hours a bit later. Now, he gets in at 8:00. He has habitually taken a prime parking spot near the door. I traditionally have taken a parking spot further out, and I get to work at 7:00 (on a good day ;)). I've recently started taking his parking spot. I mean, on a cold, dark, rainy morning, why wouldn't I? This has started what I would call a war. He parks so close to my driver side that I have to climb in from the passenger side! And he laughs about it! I should say here, he and I are VERY good friends. We go on camping trips together, drink beer together, and share work/life secrets. So this "war" does not have any true animosity. But -- I NEED TO GET THIS GUY BACK!!!! In the worst way!!! Well not the worst way, we still need to be able to laugh about it later. I should add, he's the building superintendent and he could make my work life miserable if I go too far (e.g., turn my office as cold as a meat locker, make my lights blink, etc.). So...what practical joke ideas do you have? What can I do to give him a nice, fat "OMG!!" moment, but not endanger our friendship?