Widely known as simply The Scottish Play due to being considered bad luck, those appearing in stage versions of Macbeth...sorry... The Scottish Play, would be required to perform a ritual to prevent anything bad happening on stage. Although there are many different versions of the ritual, one of the most common is to run around the theatre building, turn around three times, spit, and then ask permission to re-enter. A simplified version consists of walking three times in a circle anti-clockwise, using a curse word and then spitting. Thoroughly confusing stuff indeed, which begs the question - which version is the correct one? And if there is only one correct version, all are other versions null and void from banishing bad luck? Mind boggling.