2PM is disappointed with their first comeback stage

Just about a day ago, 2PM made their comeback on M! Countdown, performing�Without U and Don't Stop Can't Stop. During Don't Stop Can't Stop, the boys revealed their charismatic stage presence and in Without U, they revealed their armpit hair arm muscles. Though the fans clearly loved it, it looks like the boys weren't satisfied with their performance. After stepping off stage, 2PM said, "We were so happy to see our fans from the stage. It's been so long. We didn't show 100% of what we had practiced. We will work harder and try to show 200% of what we practice. We hope you guys will keep loving and supporting us." The only thing they should've been disappointed with was Nichkhun's hair in Without U. His hair should be deemed as animal cruelty.