In Arnolds, childhood, one day, when his family was at a diner, he noticed that he had forgot his jacket in the car. When he returned, he saw how a man shot himself in the head. He had shot Arnold's family before that and when Arnold saw them dead, he got a trauma of some sort. Later, when he went to college, he invented an alter ego for himself, the Midnight Marauder . He started to protect the innocent, and over time it went to the others student's nerves. One day he tried to stop a car race. That's when Sam leaped into him, his task being to change Arnold's life.In the Waiting Room, Al had a hard time talking to Arnold, because of the Midnight Marauder stuff. Eventually though, Al got through Arnold and made him face his childhood trauma, in an effort to make him stop taking stupid risks as the Midnight Morotter. This worked and Arnold leaped back.Not much is known about his life after that, except that he didn't make anymore stupid risks and is presumed to have lived a long life. Show less «