NC: Narrative: Pre-Viz - Assistant's arrival during Knife throw

I have done this playblast for the Assistant's arrival during Oliver throwing the knife. This is a little jumpy and so will need to be fixed, and obviously as this is a pre-viz of this sequence, it isn't properly paced. I am having some difficulties with Mental Ray rendering, at the moment, as it always shows a black screen when I try to render a frame. I, therefore, am using the Maya hardware render settings.