Culture
눈치, 빨리빨리, the air
The sentence you didn't say is often the Korean one.
눈치 is reading the room before you plant a joke. It is not magic. It is watching whether anyone else refilled the water.
빨리빨리 is speed as manners — don't occupy the gate, the POS, the 김밥 line. It is not permission to be cruel.
If a table goes quiet after you speak, do not double down in English. Switch to 죄송합니다 and let it pass.
Say these
눈치
nunchi
reading the room
죄송합니다
joesonghamnida
I'm sorry (formal)
잠시만요
jamsimanyo
just a moment
Check
눈치 is closest to