Why do the Japanese think that if you scream the punch line, it will be much funnier? Is this some kind of cultural difference?
"Screaming the punch line" is to indicate that the two are indeed misunderstanding, and not both of them are dumb. It also helps resolve misunderstandings on the spectator's side, especially where word plays are involved.Manzai is a traditional style of stand-up comedy in Japanese culture, which usually involves two performers (manzaishi) —a straight man and a funny man—trading jokes at great speed. Most of the jokes revolve around mutual misunderstandings, double-talk, puns and other verbal gags. [...]