9 Screamers all at once

9 Screamers all at once is a screamer video uploaded by YouTube user Jupiter9099 on May 24th, 2012. 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, 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.

Link
NOTE : The following video contains screamers.
 * youtube.com/watch?v=j6N4A7VCt5o