"Thin Air (Score Demo)" is a musical number written and composed by Canadian score composer, Christophe Beck, for the 2013 Disney animated film, Frozen.
The track plays as Kristoff asks Anna how she plans to stop the eternal winter, to which she simply replies, "I'm going to talk to my sister." When Kristoff expresses he doubts at this plan, Olaf supports Anna, believing Elsa to be quite kind, while he is comedically impaled by a large ice spike. It continues with Anna attempting to reach her sister by climbing the mountain, only for Olaf to have found a staircase that leads right to the ice palace. Anna then abandons her climbing attempt and falls into Kristoff's arms, remarking that it "was like a crazy trust exercise."