My previous post contained the following, offered as a peculiar example of superstition; I decided to move this to its own post (edited a bit).
I found the following in an article in the Washington Post (that appeared on 2014-05-11) about how Pope Francis takes the existence of the devil seriously:
During the conference [on exorcism], the Rev. Cesar Truqui, an exorcist based in Switzerland, recounted one experience he had aboard a Swissair flight. "Two lesbians," he said, had sat behind him on the plane. Soon afterward, he said, he felt Satan's presence. As he silently sought to repel the evil spirit through prayer, one of the women, he said, began growling demonically and threw chocolates at his head. Asked how he knew the woman was possessed, he said that "once you hear a Satanic growl, you never forget it. It's like smelling Margherita pizza for the first time. It's something you never forget."