Some calls, which normally start from ocean waves, can also be done when dancers are in facing couples (e.g. Swing Thru, Spin the Top, etc.). In this case, the dancers first step into a momentary right ocean wave and complete the call unless the caller specifically directs a left-hand call (e.g. left swing thru, etc.) in which case the dancers step into a momentary left ocean wave and complete the call. Exceptions to this rule are listed in the body of the definitions.