Thank you everybody for you concern. It took only 8 hours because there was no treatment necessary. My middle metacarpal was crushed and did not break. The doc said that such bones can be flexible, kind of rubbery, and will not always break under such an impact. I still can't use the hand for a while and that sucks. I have to tell my client that his furniture will be late.
But I did get to read a translated paper version of Orson Scott Card's "How to Write Science Fiction and Fantasy"