In a meeting of neighbours, Enrique says "there is no one who can lives here" (the title of AQNHQV) and Fermin start to humming the intro song of the series where both actors worked.
When the neighbours invaded Bruno's appartment, he says "Judith! The tingling! ("hormigueo" in spanish)" and Coque says to him "Ayer you going to the TV?" because he things that Burno says anthill ("hormiguero" in spanish).