About

I'm in China for the semester. I'm here having fun, have too much time on my hands.
So, it was raining and I was bored. I realized I teach both of my courses here on April first.

April Fools

I am giving my lectures with notes like this, in HTML form and scrolling through as I talk about the material.
It was a short hop from there to a little Javascript that does what you're seeing here.
It selects a random character that is visible on-screen and does something amusing to it.
The demo here fires every two seconds. I dialled it back to every five seconds in lecture, so the effect was more subtle.