 This action is created through the bending and straightening of the knees, with bending occurring on the beats of 1 and 2, and the straightening occurring between.However, unlike the bouncing of, e.g., Polka, there is no considerable bobbing.Also, Samba has a specific hip action, different from that in other ballroom Latin dances (Rumba and Cha-Cha-Cha).