I know the subject is tedious to some.......but there appears to be some evidence that Ward grabbed Stewart's wing as he drove past, and subsequently fell off/under and suffered fatal injuries.
This enhanced stop-action video is compelling.
http://www.youtube.com/watch?v=poTRhhiJ6j4 I call a reflex action as he saw the wing about to hit him in the head. He reached up to deflect it. That seems more reasonable.
Now...I'll let you kiddies squabble some more.