큰일났다.

A: Is it just me or does your tire look low on air?
B: Now that you mention it, it does seem to be deflating.
A: No wonder! There’s a nail between the treads.
B: Holy moly! Why me?! 큰일났다.

A: 나만 그런 건가, 아니면 네 차 타이어 바람이 빠진 거니?
B: 그러고 보니, 바람이 빠지는 것 같네.
A: 그럼 그렇지! 바퀴 홈 사이에 못이 박혀있어.
B: 어머나! 왜 나한테 이런 일이?! What a predicament!

[Additional expressions]
*Is it just me
– Is it only the way I see it / Am I the only one who sees it
*Does your tire look low on air?
– Does it seem like your tire has lost some air? / Is your tire low on air?
*Now that you mention it
– Now that you say it / After hearing you say that
*it does seem to be deflating
– it looks like the air is leaking out / it appears that the air is escaping
*No wonder!
– I see why! / Here’s the reason! / Now I’ve figured it out!
*There’s a nail between the treads.
– There’s a nail in it. / You’ve picked up a nail.
*Holy moly!
– Oh no! / No way! / Oh man! / Unbelievable!
*Why me?!
– How can this happen to me?! / Why did this have to happen to me?!
*What a predicament!
– This is a problem! / This is a really tough situation to be in!