kimkijeongs:

Another layer to this sequence is the moment when the son [Ki-woo] (Choi Woo-shik) instructs his father [Ki-taek] (Bong’s longtime collaborator Song Kang-ho) how to act out the script they had written. “When they rehearse it looks like filmmaking,” Bong remarks. “It’s a humorous scene. In reality, the father is played by one of the most renowned actors and the son is an up-and-coming actor. It’s as if Ansel Elgort is teaching acting to Al Pacino. It’s funnier for the Korean audience.” 

breaking down a scene in Parasite (2019)