Dive Thru
The couple whose back is to the center of the square (unless a specific couple is directed) makes an arch by raising their joined inside hands. The other couple ducks under the arch and moves forward. The couple making the arch moves forward and does a california twirl. If neither couple has its back to the center of the set, then one couple must be directed to dive thru the other couple.

Facing couples (man and lady).

Box, couple diving, 2 steps; couple facing out, 6 .

The couple making the arch uses a loose handhold. Stand far enough apart to allow another couple to dive under. It is permissible for dancers making the arch to part hands momentarily if it is uncomfortable to reach over diving dancers. After hands are rejoined, styling should be the same as described for California twirl. Couple diving under uses couple handhold. Bend low enough and stay close enough to partner to move comfortably underneath the arch.