"Breezeblocks" is a song by British alternative indie rock quartet alt-J from their debut studio album An Awesome Wave (2012). The song was released on 18 May 2012 as the album's second single. The song was written by Joe Newman, Gus Unger-Hamilton, Gwilym Sainsbury, Thom Green, Murad Merali and produced by Charlie Andrew.
Directed by Ellis Bahl and starring actors Jonathan Dwyer, Jessica DiGiovanni, and Eleanor Pienta, it is the band's first official music video and was created to accompany the release of the song. The video features a violent fight in a darkened apartment between a male and a female character shown in reverse, beginning with the death of the female character at the hands of the male character, who bludgeons her with a breeze block (a reference to the single's title). As the fight progresses backwards, it is revealed that the female character is the aggressor in the fight, having ambushed the male character by restricting and concealing a second female character, implied as being his wife, in a place where he would be distracted with her while she crept up on him with a knife. The video aired for the first time on YouTube on 23 March 2012. The video won a UK Music Video Award (UKMVA) for "Best Alternative Video" on 8 November 2012.