It is bad luck to look at the moon over your right shoulder. If through mistake you should look at it over your right, face around, take three steps backward with your hands clasped behind, and then look at it over the left shoulder.
Alabama.

It is bad luck to look at the moon over your right shoulder. If through mistake you should look at it over your right, face around, take three steps backward with your hands clasped behind, and then look at it over the left shoulder.
Source: Current Superstitions (1896), entry 1096.
Fanny D. Bergen, editor.
Modern normalized navigation; the historical attribution above remains unchanged.