The production crew of 'Running Man' pulled a hilarious prank on the cast members in the latest episode!

One of the challenges in this episode featured a rickety log bridge over two tall buildings. Although the bridge was guarded by safety nets and trampolines, the cast members were still understandably shaken upon seeing the game, questioning the producers' sanity!

Blindfolded, they were led one by one to the bridge, having to cross it with only their sense of touch. Scared out of their wits, most of them eventually managed to cross - but was treated to an unpleasant surprise when they took off their blindfolds!

The bridge they actually crossed was nothing more than a plank laid across a few inches above the rooftop, with the bridge they saw from the ground nothing more than an elaborate prop to sell the hoax. 

Check out the hilarious clip below, as Lee Kwang Soo becomes the first victim to fall for the prank!

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