I don't think describing exactly what Erek did in there would have been a good idea.
I mean, he killed, what, 50-60 people? Like a third of them humans?
That alone makes it the most intense knock-down drag-out standing battle in the entire series. With a target audience of 12 year olds, you don't exactly want to be describing the canine android pulling people's heads from their shoulders, etc.
But the way it was structured works really well. Fade to black, open on scene of building with eerie smoke and tales of destruction. Scares the hell out of anyone.