Emotionally...
The BEST film about Heroin Addiction I've ever saw. I love Trainspotting, Christiane F, Requiem for a Dream and all the slew of films about Drugs (Especially Heroin, the Most Powerful of them all)...
Oslo manages to TRULY dig deep into the Psyche of an Addict. While we are witnessing one man's life, the emotions he goes through resonate through anyone who has suffered the life of an addict. I have lived that life. I have felt that lethargy. The self pity, the sorrow... Seeing a friend doing the right thing and wanting that life again but knowing how hard it is. Wanting to be the rest of the crowd. Enjoy the basic pleasures of life. The trivialities of the World. This film captures it all, it's remarkable.
Whether or not death is at the end is really not the certainty. Heroin is now flooding through his veins again. While I feel that it IS his last day, it doesn't matter. That's not what makes this film so powerful. The scene itself is almost like, "Okay, let's get this over with"... You KNOW where he's gonna end up. That day or the next...