EXO made a surprise appearance on the latest broadcast of MBC's 'Infinity Challenge.'

The 'Infinity Challenge' members practiced "Growl" for the high school students but had a hard time learning the lyrics and choreography. Just when they were feeling like a failure, EXO came to their rescue.

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When they appeared, Yoo Jae Suk laughed as he compared his members to EXO and pointed to his members to tell them, "You guys became squids and baby octopuses!"

Meanwhile, all the female staff on scene crowded together to catch a glimpse of EXO. The cast expressed their surprise by pointing out various staff and telling them, "I haven't seen you in a while, how did you get here?"

The high school students also jumped up and down with joy for EXO's surprise appearance.