Mentos + Yakult

Mentos + Yakult is a screamer video uploaded by YouTube user Lincoln Lin Junhong (linboyz94). As of 2017, copies of this video has accumulated over 7.5 million views. The earliest known copy of this video was uploaded in 2011.

Mentos + Yakult
The video starts by showing a pack of Mentos and a bottle of Yakult. Then, the person opens the bottle and the pack and drops the Mentos inside the bottle of Yakult. About five seconds later, a close-up of Regan MacNeil from The Exorcist appears with a loud scream.

Link
NOTE : The following video contains a screamer!
 * youtube.com/watch?v=DtNX2rPaDuI