[Video] Yoona & Seo Hyun practicing "Pitch & Bat" !

Still remember that SNSD's members Seo Hyun and Yoona opened the pitch during the match between Doosan Bears and Kia Tigers?

A clip of the girls practicing for the match has been revealed recently ,the girls are so serious during the practice,but Seo Hyun's leg is a bit to high right??