[BoomerSooner]

Here is an interesting spin on this situation, that I've only seen come close to happening, but interesting all the same. What if in this situation, the runner's helmet had fallen off (I know alot of leagues are requiring chinstraps, but lets assume for this example there is nothing to impede the helmet from coming off) and hits the ball or even trips up the fielder.

Now to my knowledge the only rules regarding equipment intefering with the ball use language regarding "intentionally placed" or something else to that nature.