Courtesy of my friend beaq, Cake Wrecks. All from professional bakeries: Puffer fish cake, Chuck Norris Doesn't Cry cake, and Russian roulette cake.
Telling time with calculus. It would be easy to duplicate this with any plain clock that has a flat face and a bit of chalkboard paint. And chalk. And you do have to be able to do calculus, of course.
One of my favorite bloggers, Greg Hlatky, gives us handy Latin phrases. E.g. (hey, that's Latin!):
Non calor sed umor est qui nobis incommodat.
It's not the heat, it's the humidity.
Di! Ecce hora! Uxor mea me necabit!
God, look at the time! My wife will kill me!
Estne volumen in toga, an solum tibi libet me videre?
Is that a scroll in your toga, or are you just happy to see me?
The Woolly Thinker's Guide to Rhetoric.