This one may go up on my wall: it's a monk doing penance under a waterfall. The story is that he stays in so long, he falls unconscious and those fantastic figures watching on the side have to fish him out.
Here is the full triptych of the flue player--the guy behind him is an assassin. He decides not to murder the flute playing aristocrat because he is so enchanted by the music. This one is definitely going to hang in my office.
And this one I did not see at the museum (sadly)--but I discovered it on the internet--found it quite charming/amusing.