Robin has dealt with the boygroup BTS from South Korea.

“They come from Busan! I once saw an interesting movie about a train that goes there! At some point most of the passengers look a bit different from the guys from BTS, but maybe they would look the same without make-up.” That would indeed be a possibility!

“By the way, B in BTS is not ‘Busan’ but “bangtang”- and that means ‘bulletproof’.”
Should the passengers on the train to Busan start shooting, this band would be prepared in any case.