They are eerie sensations, more common than one might think: A man describes feeling a shadowy figure standing behind him, then turning around to find no one there.

• 灵魂出壳是怪诞诡异的感觉，出现之频繁超乎人们想象：一名男子描述说他感觉背后站有一人，当他转过身却发现空无一人。