Pawns absolutely love their overkill and almost always charge their spells to the highest level, whether they be fighting goblins or drakes. They're also fond of joining their spells together to multiply the effects. This can lead to Curb Stomp Battles consisting of a lone goblin flailing around in a panic as he gets pelted by a dozen gigantic meteors, or awakening a nest of sleeping saurians with a quartet of tornadoes.
Also, anytime a goblin gets hit by the Deadly Arrow skill. *SPLAT!*
Duke Edmun's reaction to the party hat his jester puts on your head when you first meet him. "Your crown outshines my own" indeed.
Jump off a high ledge when your health is extremely (read: 1000+) high. The resulting splat/faceplant is HILARIOUS, and only to get up with a slight groan.
Feste:Mi'lady is mistaken. I would never violate His Graces privacy while he violates Mi'lady's privates...
Enemies are just as subject to falling damage as you are. The obvious use for this is to throw them off of nearby cliffs, but some enemies can be tricked into taking suicidal plunges all on their own. For example the cyclops on the narrow pass to Heavenspeak Fort can be enraged by snapping off one of its tusks; if it rampages too close to the edge of the cliffside the great oaf will go plummeting to its death followed shortly by the entirely-inappropriate heroic victory theme.
Pawns can sometimes utter completely out of place observations during the most inappropriate times
Pawn(when fighting a giant, fire-breathing drake who is killing everyone): Look, Arisen, a rope! Seems suspicious...
Thanks to the game's romance system, your character can fall in love with almost anyone you find...with interesting results.