Footage of�INFINITE's Woohyun in martial arts practise has been quickly making its rounds amongst fan and various video portal sites alike. The video is said to be a teaser for the group's upcoming comeback, and features Woohyun receiving martial arts training.�In this 10-second clip, he shows off an impressive jump and knee-kick, leading netizens to dub him as the 'action-idol.' Netizens commented, "He's really good," "He's floating in the air! INFINITE action idols," and "I wonder what the comeback is?" The group is currently preparing for their second mini-album. Source: Sports Today via Nate