9 Screamers all at once
The video is 9 screamers running simultaneously. These are, from top to bottom, left to right: K-fee car commercial, The Maze, Luna Game 1; SCP-450, Luna Game 3, Proof of Michael Jackson's Ghost; Ghost Caught on Tape, Stickman Screamer, and Luna Game 2. At 36 seconds into the video, the screamers will all go off at the same time; the shorter screamers are delayed and appear at a later time in the video, so as to properly sync with the longer ones. There is also another version, 9 Screamer reactions all at once, which shows people reacting to screamers.
NOTE: The following video contains screamers!
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