Back when I was 15 I made my 7 year old cousin watch Childs Play 2 he was scarred ******** of Chucky.
Two days later go to comic book shop with with other cousin the same age as me we bought a collectors life size chucky doll that spoke for €50. That night we wait for him to fall asleep and we place the doll at the top of the stairs
my other cousin was up there with it make my 7 year old cousin head up the stairs to go to bed switch on light other cousin switches on the doll it speaks little cousin shrieks in fear crying like a witch from L4D pisses himself puddle of piss at the top of the stairs. To this day he still has nightmares and I still find it hilarious but also feel guilty and feel bad for him.