A childhood belief about monsters

When I was a tiddler we lived on the second floor of a block of flats.

One day while Mum was chatting to a friend (for much longer than my own attention span could handle) I looked at a door which appeared on one of the external walls and it opened.

Maybe it was some portal to another dimension or maybe I was just daydreaming but some human-sized squirrels walked through and threatened me with their machine guns!

Worse still, I couldn't interrupt Mum's chatting and had to wait until she stopped before I could tell her so I was constantly peeking out the kitchen door to check that the giant squirrels hadn't seen me and wouldn't come to drag me to their home dimension!

To this day I am still nervous around squirrels in case they grow big suddenly...