In Australia, Canada, and the United States, nosebleed section is a colloquial expression designating the seats of a public area—typically an athletic stadium or gymnasium—that are highest up, furthest from the desired activity, and (typically) cheapest. A common tongue-in-cheek reference to having seats in the upper tiers of a stadium is "sitting in the nosebleed section", or "nosebleed seats". The reference alludes to the tendency for mountain climbers to suffer nosebleeds at high altitudes.