Get ready for more scary security camera footage with the first video from "Paranormal Activity 4."

A teaser for the latest entry in the freaky found-footage franchise went live this morning, giving a very brief glimpse at what to expect from the next film ... due out in October.

The video shows quick clips from the first and second films -- including a shot of Demon Katie (Katie Featherston) leaving her sister's home with nephew Toby from Part 2.

The only new footage is of a blonde girl screaming.

It's not much to go off of, but it's definitely got us excited about the full trailer ... which drops Wednesday. We'll bring it to you as soon as we get it!

Are you ready for #4 or are you over it? Sound off below.

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