We had a "previous model cleansing" ceremony once. When we were about to launch a new version of our product (this is a physical piece of equipment), we took o

We had a "previous model cleansing" ceremony once. When we were about to launch a new version of our product (this is a physical piece of equipment), we took one of each model to an open car park lot, gave each of us a hammer. Each of us took our turn to smash it the bits with our hammer. Had a quiet drink afterwards with the team.