Answer
Fear of confined spaces.
An easy way to remember this is to associate the word "closet" with "Claustrophobia.
Claustrophobia
We use the term claustrophobia for the fear of confined spaces. A link can be found below.
It is called claustrophobia
Having the fear of being stood behind is a form of claustrophobia. Claustrophobia is a broad term for the fear of confined spaces.
claustrophobia, the fear of small and cramped place
Claustrophobia is the fear of enclosed places and suffocation.
Possibly claustrophobia (fear of enclosed spaces)
Claustrophobia is the fear of small spaces because it is a combination of the Latin word claustrum (meaning enclosed space) and phobos (the Greek word for fear.)
The fear of water is called aquaphobia. The fear of a water well would fall under the term claustrophobia.
There is no special word for a fear of tunnels. However, it is likely a form of claustrophobia, which is a fear of enclosed spaces.
Claustrophobia is the fear of small spaces. It can lead to people panicing
Probably just a slightly altered case of Claustrophobia- Fear of confined spaces.