guessing she was pulling hard with some underlying anger at the time, imho
- - =
Or, at an unnatural angle for holster removal? That could make it difficult to draw.
She clearly messed up, but guy was wearing very baggy pants and a crappy IWB holster. It looks like she was trying to remove the holster and gun together at the same time, but should have just gently removed the pistol from the holster.
But there was really no need to disarm him in the first place.