On the last episode of 'MIX & MATCH' on November 6, veteran singer Psy made an appearance to reveal his thoughts on B.I, and Jung Chan Woo revealed which trainees were scary to him.

The final episode showed a past video message from Psy that was taken during the final match.  He said, "Hello.  I'm Psy.  This is the final stage to decide the next generation YG group.  B.I is a machine.  Composing machine, lyric writing machine, practicing machine, rapping machine, dancing machine.  He might be the person who set the new trend of the 21st century," not sparing any compliments.

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However, when the boys gathered for the final time in their dorms, Jung Chan Woo revealed a slightly different impression of not only B.I but also Bobby.  

Bobby said, "I really tried not to get attached, but I couldn't help getting attached."  Jung Chan Woo said, "At first, the hyungs were so scary."

B.I asked, "When you first came in, who seemed the scariest to you?"  Jung Chan Woo replied, "At first, B.I was the scariest."  However, he continued, "But that doesn't mean Bobby wasn't scary.  Now, Bobby is the scariest," making everyone laugh.