Horrible Hitchcock Swimming Pool

Swimming pools are most often associated with relaxation and fun.

But, after waking up from a terrifying dream last night, I wish to make a horrible swimming pool, vaguely based on Hitchcock's movie The Birds.

The pool is circular, a rather narrow but very deep tube.

The pool is lit at the bottom.

You would only swim in it at night.

At the bottom of the tube-pool, there is a series of locks that can be opened. In the locks, a quantity of small, plastic, black birds is stored.

You would swim in the lit pool at night, and with the push of a button, the locks would open, and the plastic birds would swirl up towards the surface.

This is the Horrible Hitchcock Pool. The birdies will get you, somehow.