Colour Blindness Test

Colour Blindness Test is a screamer video Uploaded by YouTube user Ashwani Srivastava. The screamer asks the viewer what number can be seen. However, After The Last one is Complete, a picture of Regan MacNeil from The Exorcist pops up along with 2 delayed screams.

Link
NOTE : The following video contains a screamer!
 * youtube.com/watch?v=r6C3yybUUgg