This one is good for a laugh.
We arrived quite late so unfortunately I didn't get any better videos than this . Zumthor's office is actually very nice. There is a timber main building and a newer looking concrete office, which looked like where they stick all the students. Its worth the visit, note: its quite difficult to walk there.
I actually managed to talk to one of the architects, however I had simply expected to be kicked out, so when asked for my portfolio I unfortunately didn't have it.