It's my understanding that taratula's can "scream", or at least they "scream" when you kill them. I know I felt deaf after I killed one. (I no longer kill spiders, unless it's a brown recluse or a black widow in my home. I've paid for that, some years later my room was infested with wolf spiders and I got bit a lot.) I did not expect to find a large tarantula in my house in my dirty laundry. This was back when I lived in Oklahoma. If I could go back in time I would have tried to catch it and at least put it outside. I admit it was a beautiful spider though.