the balloon goes up

US /ðə bəˈluːn ɡoʊz ʌp/
UK /ðə bəˈluːn ɡoʊz ʌp/
"the balloon goes up" picture
1.

큰일이 벌어지다, 상황이 심각해지다, 문제가 발생하다

a serious or unpleasant situation begins to develop

:
When the boss finds out about the mistake, the balloon goes up.
상사가 실수를 알게 되면, 큰일이 벌어질 거야.
We need to be prepared for when the balloon goes up.
상황이 심각해질 때를 대비해야 해.