Die Reibenkunstmaschineaktion

I got the machine back from the gallery yesterday and set it up in my office, to trap the unwary (though more and more people are learning that it is a Bad Idea to go into my little corner of the office without some very well-defined and short-term request, and that they must not get distracted by anything they may see or hear while there).

Here is a brief video of the machine in action, demonstrated by my co-worker Nadine.