Be aware of one other thing. You can Roll if *your* last part had turning motion, even if it isn't the last part of the call. For example, Swing Thru. From a R-H Wave, all Right Arm Turn 1/2. At this point, the ends are done, even though the call is only halfway done. Then the Centers Left Arm Turn 1/2. Everybody can Roll (the Ends to the right, the Centers to the left) even though the Ends did not do the last part of the call.