Her forward motion was stopped.
The collision was caused by the 2 guys behind her proceeding forward and hitting her.
Snowflakes are so easily damaged.
We certainly agree that Lewandowski jerked her from a fast walk to a stop (She actually went backward over a foot). We also agree that she was then hit by two guys that were still moving.
The only disagreement seems to be the magnitude of the damage. I've never opined on that, only that Lewandowski and Trump lied about the incident.