A scene I'd like to see:
Party enters the Small Teeth Pass, and casually slaughters the handful of Orcs they bump into. Party starts exploring the map, and the Tank steps on the invisible script trigger-point.
Cloud Giant- HEADS UP.
A Comet spell is cast at the trigger-point, injuring any party members that happen to be nearby.
Cloud Giant- SORRY.
And that's it. He didn't mean to drop that rock, he just didn't see you. Won't happen again.