There's this scene of a mentally disabled man walking down the stairs of his apartment complex and he passes the lady at the front desk. I remember him passing her several times throughout the movie and everytime he does, he is more intelligent than before. I believe he was getting experimented on by scientist. And this caused him to get smart so rapidly. Spoiler alert, he died at the end. I saw this movie as a child and cannot remember the name. Can anyone help me?