Fear of pool covers
For every phobia, there is always a trigger or a previous traumatic experience, and this Redditor story proves this theory. She explained her fear of pool covers began when she was way younger; she decided to swim in a pool that had already been covered up. So we assumed she opened a section of the pool slightly and got in immediately.
While she swam, she realized the slightly opened pool covers had closed up, so she tried swimming to the surface to get air. She could not do so as there was no way to get out or call for help, thus, increasing her panic. Ever since that close shave with death, she couldn’t face a pool cover as the event replayed in her head. In situations like this, psychologists offer intensive therapy that may help her eliminate her fear.