Bullhead: A man running from his past
He wants to forget about it, but it is impossible for him to get away from it, because that has driven him to be who he is now. As the opening narration suggests, even if it is buried below and everyone including him is silent about that as if nothing ever had happened, it never goes away. It remains beneath the surface, and it is bound to be brought up again in one way or another, and there is no way of release possible for him.
May contain spoilers