The Feminum Mystique: Part 1 - S1-E5
Revealing mistake: When Wonder Woman goes to flip the guy out of the Jeep, he jumps out of the Jeep and right into her hands just before she flips him. The problem is that when she grabs him, just before she flips him, you can see his shirt all puffed out in the back with the distinct outline of a big pad or cushion of some kind to cushion him after he's flipped.
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.