The title "Blinkende lygter" is from a poem by Danish poet Tove Ditlevsen. The poem is referenced in the movie.
Helle Virkner who plays Stefan's aunt, also played in Matador (1978), the TV series the guys are watching.
Bent Mejding who plays Stefan's grandpa, and Karen-Lise Mynster who plays Stefan's mother played in Matador (1978) as well.
They build the restaurant simultaneously while they record the movie.