Hah, my mum gets pissed if my friends call past 10:30 or 11 (i'm not good enough for a cell ) and I was real baked..my friend was calling his phone cause he lost it, and I swore I heard her yelling and shit about not calling past a certain time, and I was flipping out...turns out no one was talking. That's the only time I've really heard shit though, made me scared.