The line comes from Harry Potter and the Prisoner of Azkaban, released in 2004, during a Care of Magical Creatures lesson. Draco Malfoy, played by Tom Felton, ignores Hagrid's warnings about Buckbeak the Hippogriff, is scratched, and performs his injury for maximum attention. Clips of the moment later spread across meme pages and soundboards as a shorthand for theatrical overreaction. It remains popular because Draco's entitled panic fits almost any minor inconvenience, from homework to losing a game.
About this sound
Draco Malfoy dramatically shouting it's killed me after Buckbeak scratches him in Harry Potter, used for overreacting to tiny injuries and minor setbacks.
This short clip captures Draco Malfoy in full melodrama, wailing that a creature has killed him after a minor scratch to his arm. His voice is high, panicked and completely over the top, stretching a small injury into a life or death emergency. The humour comes from that gap between what actually happened and how catastrophically he reacts. Played over an everyday mishap, it instantly turns the person on screen into a spoiled drama queen milking the moment for sympathy, attention and an excuse to stop work.