It is not easy to become an idol nowadays,especially in Korea where everyone surrounding you is so talented.

If you only know some simple singing and dancing skills,that are not enough to impress the audiences in Korea.I have found a clip where ZE:A's Dong Joon is practicing some acrobatics skills.

He trained really hard for all those tricks and of course he also injured himself during the practice,after watching this clip,i think i appreciate ZE:A's performance more,good job from the maknae Dong Joon!