Who made MBLAQ's Lee Joon cry?

MBLAQ's Lee Joon was the target of Idol Army's hidden camera prank. In an upcoming episode (January 13th) of Idol Army, the members all fooled Lee Joon by acting a bit harsh to him the whole time when they were filming. They completely fooled him and in the end, he even cried! They were doing a segment called "Mission Theater" where they re-enacted Queen Seon Duk and did missions during the re-enactment. One of the missions was for Thunder to hit Lee Joon on his head with gourds. The staff bought thick gourds on purpose to see if Lee Joon would say anything but he didn't. When he didn't have much of a reaction to anything, the members started blaming him for everything that went wrong. Whenever their scene was messed up, they made it Lee Joon's fault. Lee Joon kept holding in his anger by going into a corner and just reading the script. Seungho then said, "You can't be like that." That's when Lee Joon became really upset and they revealed to him that it was a prank. As soon as he found out, he cried like a girl on Thunder's laps. Didn't know Lee Joon had it in him.