[verum ago]

I don't think you payed attention to what I asked about. I wasn't talking about the moment of the handball. I was talking about when a Ghana player headed the free kick toward the goal, prior to the handball:

[Colonel_Flagg]

It is hard to determine offside from that picture since the ball is in the air, having already been played. Appiah could have run onto the ball, quite legally, in those circumstances.