So my friends cat does something very strange, and was wondering if anyone else has had a cat who does this? Big noises, like fireworks or thunder, make him growl. He will go in the window and growl very menacingly, it is hilarious! I have never seen a cat do that before! We had a cat growing up who would growl at people if they came too close to the house, she was a Siamese and could look downright terrifying in the window when she would lay her ears back, growl and hiss/snarl at strangers who came too close to the house...but never a cat who growled at SOUNDS! Completely new to me!