Step & slide: starting from infacing lines - 
final formation I think is double pass thru formation, 
not quarter tag!?
Step & Slide is done in each group of 4,
and must end in each group of 4.  "Square breathing" causes dancers to backup slightly to adjust 
to a comfortable formation.  
Step & Slide 
from facing lines is uncomfortable to dance, and in my opinion, 
should only be used as a gimmick.
Ceder Chest Definition of Step & Slide