From a Wave.
Centers Run as Ends Cross Run.
Ends in a Two-Faced Line.
Notes:
- 
From a R-H Wave, everyone moves to the Right;
 From a L-H Wave, everyone moves to the Left.
- 
Think about moving toward the handhold that you have with the adjacent dancer.
    You might even give that dancer a slight tug to get both of you
    moving toward the correct direction.
- 
At A2, Switch The Wave may only be called from a Wave.  However, 
    at C1, Switch The Line 
    (same definition as Switch The Wave) may be done from any Line of 4.
- 
If you start as a Center, be sure to Run toward the nearest End position.
    Think about flipping away from the Center.
- 
Ends Cross Run to the far Center, passing each other in the process.
- 
Everyone can Roll after Switch The Wave.
- 
Switch The Wave can also be thought of as a Swing-Slither
    (except that everyone can Roll after a Switch The Wave, 
    whereas those doing the Slither can not Roll).
Switch To A Diamond [A2] (Ron Schneider 1973):
 From a Wave (or any other Line of 4).   
  Centers Run as Ends do your part Diamond Circulate.  
  Ends in a Diamond.
Switch To An Hourglass [A2] (Sandy Knowles 1975):
 From Parallel Waves (or applicable Parallel Lines).  
  Centers Run as Ends do your part Hourglass Circulate
  (Lead Ends 1/2 Circulate as Trailing Ends Veer Inward to end
  in a Mini-Wave with their opposite).  
  Ends in an Hourglass.
Switch To An Interlocked Diamond [C1] (Sandy Knowles 1976):
 From Parallel Lines|Waves.
Centers Run as Ends (do your part) Interlocked Diamond Circulate.  
Ends in Twin Diamonds.
Cross Roll To A Wave | Line [C1] (Chuck Peel 1971):
 From any Line of 4.
  Centers Cross Run as Ends Run.  
  A Two-Faced Line ends in a Wave and vice-versa.
  This is the opposite of Switch The Wave.