Emotional effect of Book 2 chapter 5 of Lord of the Rings.

I was just reading this chapter, and got to the part where the Balrog emerged, which was pretty cool. It made me kind of excited to see the Balrog, one of the greatest enemies of all of Middle-earth. I thought it was amazing what Gandalf did with the spell that broke his staff. But I did get sad as Gandalf was falling with the Balrog. That is bad. I mean, the promise he made to Frodo, he did his best, but now he's most likely dead. But knowing Gandalf, he is probably going to come back later on in the book alive and good as new.