I’ve been trying to build up my Twitter list so that I’m following some useful/interesting people. There are some Twitter users that post fact-of-the-days type things, which are pretty interesting. I found up about the Tetris effect through one of them (but it wasn’t interesting enough of a user for me to follow).
I’ve had this happen before, yes with Tetris. And also with Warcraft. It happens more in my dreams, and apparently this is known as Hypnagogia.