Not enough action in the first two Paranormal Activities for you? Well, perhaps the third origin story will fill your demon-on-human violence quota! This brand-new trailer is packed with all sorts of spiritual smack-downs and furniture throw-abouts. Watch!

This origin story goes back to when the two doomed sisters were just tykes. And as you can see, the creepy, all-night bedtime stare sessions have been a long family tradition. But there's more than just sleep-staring in this flick. Behold the sleep-demon-jumping and vigorous priest-smacking. Where was this evil brute in Paranormal Activity 2? Either way, this horror flick looks much better than the last.

Paranormal Activity 3 will be in theaters on October 21st.