Students are the primary victims of this trick.  Missionaries wait outside the examination centre and and handout a Christian pamphlet or a photo of Jesus and tell the students to keep it in their pockets.  Students are also told that in case they fail to do so they may be cursed and fail in the examinations.  Out of fear students usually keep these in their pockets.  Once graduated students are constantly brainwashed that because of keeping Jesus's photos they passed and if they abandon the same anytime in life their life will be ruined.

Many medical students keep bibles under their pillow out of fear as medical school examinations are considered to be the toughest.