I think it means like when your life is just about over you see all your memories go by you and sorta makes a little story that your going through and you finally have an ending, and your in the hospital on your death bed like depth said, and you finally wonder "what was i thinking,i really got what i deserved for living this life like i did,no love,always complaining,i should of listened to them..."
Don't take my comment as a oh this is making fun of emo kids, well it's not, cuz I am one, and this song means the world to me.