What is Door Bell

This is the door bell that rang, observedly without any direct physical contact provided by a living person and without any evident technological means for doing so. This occurred once at the Jung home during Carl's adult life. A few days later he had succeeded in proceeding with work on his next book, but the mysterious paranormal door bell ringing event was mentioned. Apparently it occurred during a two day period of intensified paranormal outbreaks and then everything went back to normal.