A few days ago, Super Junior member Choi Siwon attended the the release party for the SK Telesys Smartphone W S-100 'Reaction' phone. As an endorser of the phone, Choi Siwon stars in a new CF for the Reaction phone. The CF features a brief car and foot chasing scene with lots of action, so if you're wondering how Choi Siwon is going to look in the upcoming SBS drama Athena: Goddess of War, this could be a small taste of what's to come. The slow reaction of Choi Siwon in the fight scene is to make a point that the fast reaction time is a key selling point of the phone. Check out the CF below: Tip: Dorian Photo: Sports Korea