There is a Milanese legend that if you want good luck (or to avoid bad luck!), you must spin on your heels backwards while standing on the bull mosaic at the Galleria Vittorio Emanuele II in Milan, Italy. And you can just stand anywhere: your heel must be firmly on the bull's testicles!
We thought this was odd and interesting! Being a little superstitious, I decided it would be best to go for the good luck and avoid any bad luck and go for a spin!