Kim Jong Kook and Yoo Jae Suk are very good friends and be filming the hit TV seres Running Man' alongside each other for many years. Now, after being so close for so long, Kim Jong Kook admits that Yoo Jae Suk has influenced in a humorous way.

During a radio broadcast of SBS Power FM 'Cultwo Show' with Kim Jong Kook as a special guest, fans had noticed the interesting change in the way Kim Jong Kook now speaks saying, "You speak faster now," 

Kim Jong Kook responded, "I normally talk fast, but I'm surprised this was brought up about [Turbo's] concert." He continued to reveal that he had been influenced by Yoo Jae Suk's talking habits saying, "I've been influenced by Yoo Jae Suk as well. Since we film together, I've changed a lot. I talk faster, and I can't stand silence."  

It is no surprise that their habits start to reflect upon one another and now fans are curious what traits Yoo Jae Suk might have picked up from Kim Jong Gook? Fans even commented on their brother relationship saying, "I noticed this starting in Family Outing. That's when he started to yell at Yoo Jae Suk and speak louder. He was pretty quiet and timid before." Can you notice the small change in the Kim Jong Kook now?