From various formations.
Replace each Arm Turn 1/2 (i.e., Swing or Slip) with a Partner Trade and
  do the given call.  (E.g., Two-Faced Spin The Top would start from a Two-Faced
  Line and would be a Partner Trade; Fan The Top.)
Here is a partial list of calls that might be done Two-Faced at C3B:
- 
 
Notes:
- 
Calls that normally start with the right hand (such as Swing Thru) become 
    Any Hand calls.
 - 
Cast Off 3/4 often becomes a 'Push Cast.'
 - 
The given call does not have to begin with an Arm Turn 1/2 
    (e.g., Two-Faced 
    Reverse The Top).
 - 
In calls which involve a Star (e.g., 
    Relay The Top), 
    the Star often becomes a facing Star (or Diamond).  
    Do one Star Circulate (facing Diamond Circulate) for each 1/4 Turn of the Star.
 - 
Two-Faced does not mean that the starting formation must consist
    entirely of Couples.  It simply means that somewhere in the given call
    someone will have to Replace an Arm Turn 1/2 with a Partner Trade.
    For example, from a 3 & 1 Tidal setup, on a Two-Faced 
    Spin Chain The Line,
    some dancers would start with a normal Arm Turn 1/2.
    Our point is that the caller can say 'Two-Faced anything' instead
    of 'Some Work Two-Faced, all anything'.