Poisson d'avril is the French name for April Fools Day, a tradition in which children and adults stick a paper fish to someone's back without them noticing, then call out poisson d'avril when it is discovered. The joke has become a familiar seasonal reference in French-speaking communities and online, especially around 1 April, when creators share pranks, fake announcements and lighthearted tricks. This clip taps into that shared recognition, giving editors a quick audio cue that immediately reads as a joke rather than a serious moment, which keeps it useful every spring.