You need mv to move.

While trying to figure how to word the first joke with the "density"/"destiny" anagram, the second one occured to me. And when I realized one formula had p, and the other rho, which looks like p, I figured that I'd just use them both.

For something else moving, I have a flash fiction anthology available: In A Flash 2020, which you might find moving if you download it to read while you're on the bus.