Thanks for the reply. I agree with what you've said, but still there's no way an infantry unit could possibly retreat on foot fast enough for the same plane (flying on a straight course) to bomb them in three different hexes in one turn.
Maybe the question I should have asked is, "Is what I saw what was intended by the designers or is it a bug/unintended result?" I don't personally know what was intended by the designers or what they were trying to depict/resolve in the aerial bombardment of infantry. Perhaps what appears curious to me was by design.
But even if it was by design--again, if it is, then it's fine by me--it's a bit amusing (meaning humorously and not mockingly) to me that while the Germans had a 3% chance of hitting the plane with AA fire, the plane (Allies) had an unknown, but apparently decent chance of hitting this particular infantry unit in three different hexes in single turn. Improbable versus impossible, but impossible wins. (I wish I could replay it because the visual humor to me was priceless. This poor infantry unit retreating with superhuman speed, trying desperately to outrun a plane only to get bombed again and again.) But, (seriously) if it was reasonable according to what was intended for casualty results, and only odd in how it was visually portrayed, then it's fine with me.
IMHO, visually, if there was to be a retreat it would have been after the plane had passed; not because the infantry chose to wait, but simply because the plane would have been gone before they could pick themselves up off the ground to retreat.
In any event, this is not something you're going to encounter every day in this game.