There's a private residence that belongs to a fellow investigator. It sits unoccupied because of the freaky things that go on there. My friend, L., grew up there. She always knew that something was there, but it never harmed her in any way. After moving away, she'd go back from time to time to visit her mother, who lived there alone. After meeting the guy who is now her husband, he would go with her on some of these overnight visits. That's when the activity would get violent. He would get pushed, and even reported being picked up and thrown. Of course, when my team was first contacted by L., there were doubts. But we wanted to investigate. The activity started before we even entered the house. I witnessed a doorknob turn and the door open immediately after getting out of my car. And I was the first person to arrive. Then, after we decided to call it a night, there were about 6 or so people standing outside, near the back door, (the one that opened by itself), and my friend's husband was down in a squatting position, when he got shoved so hard, that his feet actually left the ground, and he landed on top of his wife, who was sitting on the ground in front of him. after a few moments of exchanging shocked looks and a few words that i won't repeat here, he slowly got up from his hands and knees, as this is how he landed. Then he said that his back was beginning to burn. We lift his shirt, and see a set of red claw marks forming across his back. That was all we needed. We rush inside to grab our equipment and leave as fast as we could. As we were running out the door, whatever was there, growled. loudly enough for all of us to hear. Now, after several months, we had an investigation near this location, and we also had a demonologist as a guest investigator this past weekend. He had heard our stories and said that he wanted to see the location that the rest of us said we'd never visit again. So, we bring him. That's where i begin regretting my decision to go back. As soon as we enter the house, you could feel that the air was different. Thick and very uninviting. Things were just wrong. It took about 5 or 10 minutes for the three men to make a mad dash for the door. we scramble to our cars, and move them to the road, just to get them away from the house. Everyone is smudging each other and our vehicles and sort of in a slight panic at this point. As I'm walking around the front of my car, i look towards the house, and see the blinds on the front window move on one side as if someone were looking out. there should have been no one in there. we were all together. after being fairly sure that we were cleansed enough to leave, we get in our vehicles, and right as we are all about to drive away, we all hear this extremely loud, piercing whistle. like a coach's whistle, only louder than any whistle that i've ever heard before. we all heard it, and looked around, thinking that a neighbor was outside. but there was no one. then, we pause to figure out where it was coming from.....when we realize that it's coming directly from inside the house that we'd just left. I've been investigating for quite a few years now, and i've NEVER encountered something like that before. something that terrified me more than i can say. Has anyone ever experienced the whistle that i've described? or could possibly have some sort of explanation as to why it may have been happening? I'm really needing some help with this one!!