It hurt . Terribly . The blonde grimaced as a stream of blood dripped down his arm , splashing onto the floor . Mello gripped his shirt and pulled it over his head , falling back against the wall a moment as the sleeve was peeled off .

Available options: +Because it helps the pain .; +Because the cool wall felt good .; +Because he lost his balance .; +Because it eases his anxiety .;
Answer the following question: What may be the reason why he fell back against the wall ?
Because he lost his balance .