The crayfish at the party became rancid during shooting. The crew had to spray the crayfish with perfume in order to make the actors stand the shot.
Shot during the summer of 1969 with virtually no rain days for two months.
Famous Swedish singer Magnus Uggla appears as an extra. His moped is also the one main character, Per, uses.
Acclaimed cinematographer Hoyte van Hoytema (Interstellar (2014), Spectre (2015), Dunkirk (2017), Oppenheimer (2023)) cited this as one of his favorite films, when interviewed on the Dutch talk show Zomergasten (1988) in 2023. He said the movie conveys so much innocence, purity and relatability. He noted Jörgen Persson shot it with 'long (focus) lenses', in order to create extreme close-ups from a distance, which lend the image a very intimate, voyeuristic quality.