Spiral staircases in medieval castles are running clockwise. This is because all knights used to be right-handed. When the intruding army would climb the stairs they would not be able to use their right hand which was holding the sword because of the difficulties of climbing the stairs. Left-handed knights would have had no troubles, except left-handed people could never become knights because it was assumed that they were descendants of the devil.

Contrary to popular belief, the majority of Bitcoin usage around 90%, is unrelated to illicit activities. The DEA has confirmed that Bitcoin is only used about 10% for criminal purposes.