yes very dark and horrific
the exchanges have been fun. I first did an international one with an American friend who has since had a residency at CERN in Switzerland - members were in the US, France, Italy, UK, Sweden and South Africa.
This is with a big group and so there are 2 books with 9 members each group, handover at the monthly meetings - we did it last year and are repeating because it was really popular. That's about a quarter of the members taking part. We showed the books at the annual exhibition too.