This "quick tutorial" introduces the general idea of a call and explains the most common cases. It does not explain or illustrate all cases. For additional details and/or examples, refer to the links in the "MORE INFO" box.
Cross Trail Thru is a combination of Pass Thru and Half Sashay. The dancers who are facing Pass Thru with each other and then the dancers in each couple switch places, with the dancer on the right going in front.