Well My friend and I were sleeping at my place. My parents weren't home, we were upstairs in the main room. We had just turned the Tv off, and were trying to get to sleep. Then Iheard this screeching sound from downstairs. I opened my eyes and looked over at my friend. He was sitting in his bed listening to it. We were super scared, cuz it would screech like every 30 seconds... We eventually got the guts to go downstairs and checck it out (with a butchers knife). We had searched the entire basement, and found nothing. And just when we got back upstairs it started screeching again... :O!! Bt we managed o fall asleep to it.