On last week's episode of SBS's 'Running Man', four lovely girl group members (T-ara's Jiyeon, miss A's Suzy, and�f(x)'s Luna & Sulli) were invited to participate as guest stars on the show. This week, however, the 'Running Man' members were shocked and petrified to find four very different guests. The boys walked on set to find four veteran entertainers, all much older than the 'Running Man' stars. They were none other than An Moon Suk, Kim Suk, Shin Bong Sun, and Yang Jung Ah. The members took a single look at their guests and hilariously took flight before even giving the ladies a proper hello when they realize what had transpired over the night. Kim Suk made the situation even funnier by joking, "I woke up at the crack of dawn to do my make-up for two hours and even put on my best outfit to be on the show... and this is how they react??" Yoo Jae Suk continued evoking laughter by saying that the girls on last week's show giggled ever so sweetly, but the ladies this week roared deep, hearty chuckles. This episode of 'Running Man' will air on August 14th. Source: OSEN via Nate