Ah, take-back-the-playground fun, aye?
Yeah, I know this kind of overwork syndrome... Funny bubbles of uncontrolled creativity.
Here some additional ideas:
How about tea bag long toss or a billy goat fight with a false deer head? Of cause crass dress crossings are nice, too, but I'd find it rather interesting to debate about the question "Did Jesus cross dress"? -preferably with a bunch of Jehovah's Witnesses. Jostle-a-sheep is certainly a nice pastime or trolley dolly bullying. Extreme couching is really cool, especially if you carry a sofa thru town and take a picture of you sitting on it in the middle of every major intersection in CBD. Fool the cops by running through malls (with the sofa) and popping out at unexpected spots! Ok, back to work.