Ok, so my doom machine will be a giant shark-infested aquarium, with the sharks spreading disease and pain to your loved ones, which will kill the subject, but in a way not revealed, the subject being trapped in a room with a window to see the aquarium, which also has a guillotine with people being executed, and a guy dressed as the Reaper, and a closet with something inside, and an exam paper you can't hope to pass, and also dementors and NO CHOCOLATE. AHHAHAHA!!!
