While conducting our afternoon walking tours around Greyfriars Cemetery, we have noticed an intriguing new local ritual unfolding before our very eyes. According to a certain Tour Guide (who will remain nameless), it is good luck to "slap the bum tree". A number of tour groups are now pausing at this tree, situated near the Flodden Wall, whereupon the Tour Guide encourages guests to slap the tree three times for good luck. This may sound completely nutty; however, perhaps we do not need to look far beyond the gates of the Kirkyard for clues as to the inspiration of this new custom.