I don't remember when I found out I could do this, it just sort of came to me. Maybe it was from some higher power, I don't know. I've only noticed I can do it for about 1 year. Now, I can Emmet this screech if you will. It sounds something like tires screeching but it's different. I remember I was on my way home and it was dark out. I suddenly felt a rush of anger triggered by a thought I had. I let out a two toned screech and something answered me. I was so scared. I did it again to show my friend, something answered me again. As I post this I am getting scared for some reason. My neighbor also told me of a time when she heard something outside my window make the scream I can make. Only it wasn't me. My friend had an odd dream about it too. We were going to McDonald's and I let out this screech and on the way back from MD, something was chasing us. It resembled something dog like walking on 4 legs, quite fast. I think it's a sound like the New Jersey makes I don't know. But my friends can't do it either. It's weird, and I'd like to know what that is before I do it any more.