I was just sitting, pretty much staring into space, and had this flashback to my time in college:

The only bit of graffiti I have ever written. (I think)

In the bathroom in the computer center there was some graffiti in Russian. I don't know Russian, but some word like nyet was the tipoff. For some odd reason I felt like I should add something. I took out a pen and wrote, "Da Tetris!", just below it.

I didn't think much more about it, though I know the graffiti stayed up there for a while. A year or two later, I was hanging out with some friends and one of them was wearing a "Russian Club" T-Shirt. There were various phrases in Russian printed kind of randomly on the shirt (in different sizes and orientations). Somewhere in the middle of the shirt was that magic phrase, "Da Tetris!"

So I asked the guy about this. Sure enough, he said that this had been spotted in the computer center bathroom and everybody in the Russian Club got a big laugh out of it and it became some kind of inside joke for them. I told him I was the source and he said, "cool," but in a tone that kind of gave me the feeling he didn't believe me.