my favourite part of the whole original Ghostbusters film is the line “Dogs and cats living together, MASS HYSTERIA!”
Mine’s a two-fer in sense. I’ve seen Ghostbusters in french (SOS Fantômes) about as often as I’ve seen it in English as a kid and the line is pulled off brilliantly in both languages. It’s Bill Murray asking the first ghost they see “Where are you from?….originally.” It’s delivered with such deadpan and just a touch of his earlier Caddyshack role. In french it’s “D’ou venez-vous?…avant d’être revenants?” which works even better.