for better effect, tie each other up, subject them to continuous playing of the song, the different versions, in different speed, in reverse, reverse mixed with normal direction, heavily process with reverb(thru hardware or software) etc, followed by putting toothpick on their eyelid to prevent them from closing eyes and let them watch constant repeat of VR man, master of the sea, the ra ra show, golden pillow(starring wan zi liang, fann wong and zoe tay) or any sbc ch 8 science fiction/ghost serial from the 80s!
maximum impact! KAAAAAPOWWWWW!