SEE ALSO: Singer Younha marries science YouTuber Science Cookie

Yoon Kye Sang's body is suspended dangerously in air as he hangs on for dear life, his hands clamped tightly to buildings's ledges. The only thing lending the actor support in these thrilling action scenes is a single wire, as he climbs the walls and makes his grand escape through the window of a four-story building. Despite these hazardous nature of these action sequences, Yoon Kye Sang didn't lose his focus and was perfectly absorbed for his role.

What's more impressive is that though the actor had a stunt double, he still performed the actions sequences himself. Further, the actor treated the rehearsals just as seriously as if the cameras were actually rolling, showcasing his deep dedication to every part of the filming process.

Catch Yoon Kye Sang become a real life spiderman when 'Last' airs this July 24!