My elevator was recently serviced, which is quite a relief as for the last year there's been a sign saying 'Last service by M. Lagrange'. For an entire year I've been running the risk of hitting a point of stability between the ground and 4th floor, destined to float between the two forever....

Of course, most of you won't have a clue what I'm talking about. It's a physics joke, that only physicists will get. Like this one;

There was a dairy farmer who, in a fit of desperation over the fact that his cows won't give enough milk, consults a theoretical physicist about the problem. The physicist listens to him, asks a few questions, and then says he'll take the assignment. A few weeks later, he calls up the farmer, and says "I've got the answer." They arrange for him to give a presentation of his solution to the milk shortage.

When the day for the presentation arrives, he begins his talk by saying, "First, we assume a spherical cow..."

I've told this to plenty of non-physicists, and most (if not all) just stared at me blankly. When I told it to some physics friends (or synchronously correlated associates as we call them), they all thought it was hilarious!

A friend of mine (a computer spod, rather than a physics nerd) reckoned that there's niche jokes for every career or hobby going, whether it's physics, accounting, or tinpot dictator. Each will have some jokes that only they get, and everyone else will give blank stares to. Well, maybe, perhaps everyone still laughs for the dictator jokes.

For those into tiny details, the lift was serviced by a M. Fils.