Rehearsal for what? For your funeral! There is an art exhibit currently in Austria, from the Reuter's news article:
Their art installation, which has passed through Frankfurt, Istanbul, Toronto and Venice, blends in well with Vienna, the home of elaborate funerals and with one of the world's few museums dedicated to death.
This may well fit into the category of "I've seen everything" but I wonder if anyone was inspired to go to confession after rehearsing their funeral?