Fabien Yoon was caught off-guard by Joo Ji Hoon's French skills on 'Running Man'!

When he and his teammate Sam Otswiri found themselves surrounded by the other members with no privacy, they decided to talk about tactics in English and French so they wouldn't be overheard. Imagine their surprise when they heard Joo Ji Hoon mutter something in French to them!

That wasn't all, however - after hearing what Joo Ji Hoon said, Fabien said disbelievingly, "Do you know what he said to me? He told me to go away!"

Alors, la vie a beaucoup de surprises, n'est-ce pas?

SEE ALSO: Actor Joo Ji Hoon opens up about being bullied during his school years