protected boolean isMine(Environmental host, Rideable R)
	{
		if(host instanceof Rider)
		{
			final Rider mob=(Rider)host;
			if(R==mob)
				return true;
			if(mob.riding()==null)
				return false;
			if(mob.riding()==R)
				return true;
			if((((Rider)R).riding()==mob.riding()))
				return true;
			if((((Rider)mob.riding()).riding()==R))
				return true;
		}
		else
		if(host instanceof Rideable)
			return host==R;
		return false;
	}