What's the smartest/coolest thing your AI has done?

[sapi]

I was sieging a town long time ago (i think i was roman) (1.1 i think), and unknown to me the enemy had onagars.

They immediately aimed for my general (who was standing still), and in a freak shot over stone walls they hit him dead on with a flaming ball. Ouch. Needless to say, he died.

The battle then proceeded to the enemy's satisfaction, with my army being pinned near the wall breach by pikemen and being decimated by archers/towers.

Without a general, my men routed, and i faced the loss of my entire greek field army, along with a rising, 20 year old, 6 star general, who died to a well timed onager blow.

[Enderel]

I've experienced a good example of intelligent campaign AI last night. (Mundus Magnus, hard, hard) Sieging an Egyption city with Seculid army and they bought up reinforcements from behind to completely trap me. Faced with two massive armies in the middle. Got to the battle map and found I was completely surrounded needless to say my army was total annihilated.

So decided to replay that round again on the campaiign map and flee the battle initially, the AI had put another army (1 unit just to have a presense) above the city and I got trapped and hit by all three armies!