OK, I know it is a little poor to boost with a victory over the AI, especially over such a weak one... but nevertheless, that was awesome.

I was defending Messala against the romans. The Scipii had their usual army - lots of Hastati, some velites, very few cav. Mostly Hastati, so hey were much better equipped for a street fight then I was. They had more men than I had, about 2:1 if I remember correctly. And, on top of that, a juli detachment would also join the fun.
What I had was 4 units of round shields, 4 iberian infantery, 2 mercenary scirmisher, one unit of mercenary hoplites, a long shield cav and elephants both at half strenght and a general. Not so bad, but nothing that would stand up well in a long fight against the roman masses.
The city had only wooden walls, so I decided not to defend them at all.
A straight road lead from the gate right to the center.
At the entrance of the center, I placed all my infantery. It was really crowded, with 5 units in the same place, but I had to hold the line.
In the middle between the gate ant the center, there was a road entering in the street. There I placed all my round shield cav. If the romans would send all their troops right to center, the would be stopped at my infantery, at least for a while. Then my round shield cav can charge out of the road and hit them right in the flank/rear.
The romans did act as I wished, a seemingly endless stream of red and blue soldiers pouring throug the road at my lines. They charged in, pushed my lines back a little, but they held. Now it was all about timing. If I send my cav in too early, the romans morale would be still intact and my charge could not break them, and I would surely lose the following melee.
If I charge too late, however, my infantery line will be broken, and I might rout a unit or two, but that won`t be enough by far.
You might have guessed it - my timing was perfect.
When the first units in the front started to flee, the cav hit home at their rear, causing the well known multi rout.
So far, there is nothing special - trapping the AI, charging with cav, causing multi routs. We all have been there and done that. What makes this one special is that it happens in a very narrow road. I play with huge unit sizes, and I tell you, you cannot beliefe the slaugter. The romans led right into the charging cav, wich filled the road from one side to the other. I don`t understand why they didn`t fight to the death, since there was no way out, but I was quite pleased they didn`t.
The killing speed was incredible. I thnk my cav extinguished 6 or 7 units in 5 seconds. They died faster than I could watch it.
The one moment the whole street was crowded with romans - and the very next moment there was just my cav standing on a bloody carpet with this "did we do that?" look in their eyes.