Jiu-ji Tae can copy moves at least superficially well, e.g. the first heel hook he didn't even practice and managed to pull it off (although on an unsuspecting Kim Dong-won), so I like to think that his ginga actually looked kinda nice-ish, at least enough to piss Young-joon off.
Also, few things have mad me quite as happy as Jiu Ji-tae realising Young-joon likes Bang Jung-eum and immediately using it to embarrass him