Wonder Woman Meets Baroness Von Gunther - S1-E2
Visible crew/equipment: After Diana sees Tommy in trouble on the ladder she leaves Steve with the Baroness, and when she finds a private area by the lockers to transform into Wonder Woman, the reflections of four crew members are visible at the right side of the screen (widescreen version).
Wonder Woman Meets Baroness Von Gunther - S1-E2
Visible crew/equipment: When Arthur Deal shoots at Steve, just as Wonder Woman deflects the bullet, the remote that controls her bracelet sparks can be seen in her right hand at the bottom of the screen.
Answer: The transformation twirling was invented for the 1970s TV series only, to explain her quick change from Diana Prince to Wonder Woman. However, it would have been nice to do a little spin homage in the movie.