Dark puke, what's wrong? wmv

Description: It's a tragic day, angie hasn't eaten or drank anything since yesterday. she feels pressure in her stomach and she is constantly nauseated. now she drinks water with vitamins, she burps and she feels that she is getting better and better. but just for a moment... suddenly, angie feels a strong pressure on her esophagus and runs to the toilet.a fountain of dirty, dark puke erupts from her mouth. what is wrong? where does the color and smell come from? there is something very wrong with her stomach.