The mass loss of innocence.
Remember how you felt when you were watching Game of Thrones this past Sunday during the big climax? (If you don't know what scene I'm talking about, you really have no business here. Turn back while you are still innocent and full of life.) Okay, now imagine that magnified by about 50. That's what you get in this fantastic reaction video taken in a Chicago bar.
Pay special attention to the different faces leading up to the big moment. You can pretty easily pick out the book readers. They're the ones who look like they're staring into the abyss while everyone else is cheering:
(by Dennis DiClaudio)