고래싸움에 새우등터진다 -- A shrimp brakes his back in a whale fight. This expression is used in a situation where an innocent bystander gets caught up in a fight between two stronger people, and is hurt in the process. (힘센 사람이 써로 싸우는데 약한 사람이 그 사이에 끼여 없이 해를 입을 때 쓰는 말)