During the press conference for the upcoming movie 'The Chronicles of Evil' on April 13, Park Seo Joon surprised everybody by revealing he had felt hyperventilation symptoms while filming.

He said, "Due to psychological factors, I underwent symptoms of hyperventilation while filming the movie," surprising everybody. He continued to reveal, "There was one time this happened in college, and while filming this movie, the phenomenon came up. While filming, my fingers suddenly curled up. While I was filming, I was nervous, so it did not hurt, but when I went home and showered, I saw that bruises had been created. I wondered to myself, 'I really don't have the knack for this, do I?' I came to properly discover while filming this movie that that was a symptom of hyperventilation. I think that is how difficult filming was.I think it was mostly because I was focusing a lot."

In relation to this being his big screen debut, the actor stated, "I'm curious about how I'll come out onscreen. I wasn't able to see the movie yet, so I am really curious and very worried about how the the movie came out. Still, I acted while believing in the directions of Director Baek Woon Hak, so I think I'd be able to debut onscreen with a good image."

SEE ALSO: Park Seo Joon shares heartfelt thoughts on his 36th birthday "A series of miraculous moments"

Although it appears he had been very nervous and stressed during filming, he still must have had a lot of lighthearted moments of fun and bonding with the other cast members on set. Co-star Ma Dong Suk stated, "On the set of 'The Chronicles of Evil', Park Seo Joon fully took on the role of an actress. Generally speaking, when an actress is on set, the atmosphere is good, but this time, I felt no envy [even though there were no actresses]. Park Seo Joon was the cutie. I filmed so many movies in which [only] men came out. It's nice when there's an actress," making everyone laugh.  

Looks like the womanly touches on set were taken on by Park Seo Joon Yona-style! 

Check out the premiere in mid-May.