Have you seen the video? Lewandowski hurried by Fields and maybe, just maybe, scooted her to the side by brushing her arm (like I do many times a day while rushing through crowded subway platforms or other public areas). Her characterizing it as “throwing her down” or “slamming her” is total BS and a deliberate lie - no other conclusion could be reached.
Here is a link to stills of the video showing they were both involved.
..Fields and Ben Shapiro Resign from Breitbart
My point in all this is that it wasn't a hoax that Fields arms was grabbed and her momentum stopped. Briebart wouldn't even stand by their reporter and so she and Shapiro resigned. For you to try to brush this off as a hoax is disingenuous.