before Edd got crazy he taked a pill along with a glass of water, however he knocks over the glass of water and instead drinks the pill along with a can of coke, at which point the doctor who gave him the pill he tries to warn him of the danger of making that mixture but Soon Edd begins to hallucinate and sees the doctor as a demon,he taked a gun out of his pocket and kills everyone around him (thats for the hallucinate).he swears that he is not crazy (the effects are gone)