It shows that the person in front of Fields pulled her back from Trump as he went by which is common among secret service and staff trying to keep crowds away from the candidate. She was lightly ushered away from Trump and the WP reporter talked her into blowing it out of proportion.
Here is a cspan vid where she was talking about occupy wall street experience. There are two curious things ... she uses the phrase "I can't believe that cop threw me down" in the occupy vid, and Terris says "He threw you down" .... in the Trump video.
in the occupy vid, she is kneeling on the ground and police are holding her by the arms, getting her up, and they could just as easily be helping her up after she fell on her own. There is certainly no violent handling of her and no vid of her being pushed down by cops.
She has a very strange affect. Oh, she has a book coming out in June.
http://www.c-span.org/video/?c4584445/michelle-fields-occupy-wall-street&beta=