However the most terrifying would be "The Giant Scorpion." I was having a paranoid day and in the eventing I had a "delusion" of a giant scorpion on the back of my head. I didn't realize until then however when a Man is literally terrified ...His screams are much more high pitched and scary than that of a woman's or a child's.
I can't remember what happened after that however according to my Dad I was rolling around on the floor.
That said ― it has all contributed to the Person I am today ... So in a sense I'm grateful for it.