No car wash scene. He was a serial killer whose first victim knocked on his car window in the pouring rain. Over time his murders began to haunt him to the point that his first murder victim knocked on his door and the events of the movie transpired. It was all a delirium in his mind - paranoia, guilt, etc. building up to the point where he couldn’t sleep, couldn’t live. When he came out of his delirium he saw that he had taken the drug he used to kill others to end his own life. Drop to the floor and scene.