2PM recently made a special appearance at a club in Kangnam, Seoul. When fans heard about this and crowded the place. It was so crowded that fans got way too close to the members and a fan's nails even scratched poor Wooyoung in the face. You can see in the picture below of his scratched up face.
credit: allkpop
If you guys ever want to get close to another celebrity, make sure you either 1. Control yourself or 2. Cut your nails (guys and girls)