Omsj

Omsj (also known as Nyasha (Няша) in the Russian web) is a 14-second video uploaded to YouTube on February 9th, 2016 by the user Adrian Cofrancesco. It starts out with a Russian girl at the camera, saying that people assume that polar bears (referred to as north little bears) can't smile, but suddenly, halfway through, it was interrupted by a flurry of gore, red lights, and scary faces (including Regan MacNeil, Pazuzu from The Exorcist and the hyper-realistic version of Bart Simpson from The Simpsons) pop up, accompanied by a very loud screech from Jingle Bells Reversed. It then returns to the girl, shaking her head and stating that is false. She then smiles.

Link
 WARNING : The following video contains a screamer with flashing lights.
 * youtube.com/watch?v=aTZTkD8FULo