Haha, that reminds me of a bridge-battle I played some months ago, Romans VS Germans and I had taken up the defensive position. As the enemy FM and commander started to run across the bridge, he also charged over the bridge with two units of heavy germanic cavalry at the same time. Now, running heavy cavalry through your own infantry can sometimes throw infantry into the air (not killing them), but any unit who "falls" on a bridge, falls in the water and dies. This is what happened to the enemy FM. The heavy cavalry got so demoralized by killing their own general, and after taking a few casualties they routed and created the subsequent massrout usually seen in defensive bridge battles.