Natural spin turn
The natural spin turn is a ballroom dance step used in the waltz. It is typically used to advance a couple  of a turn down line of dance, although an underturned spin turn is also very useful for turning a corner. The natural spin turn is also considered an intermediary step toward learning pivots. Technique

The natural spin turn consists of the first half of a natural turn followed by an under-turned pivot. Leader (man)

Follower (lady)

Underturned spin

The underturned spin is a useful variation on the natural spin turn that allows a leader to navigate a corner. The step is identical to the natural spin turn but only rotates  of a turn on the pivot (beat 4) instead of , and  of a turn on 4 to 6 instead of . This reduces the total amount of rotation by  of a turn. References

External links
 

Waltz dance moves