Book High
When I get into a book, every sense is heightened. My pulse races, and I speed through chapters to see what happens next (all the while being sure to take it easy enough that I don't miss things). I just finished Dzur, by Steven Brust, and it was exciting. I am quite invested in Vladimir Taltos and the various other characters, and the long friendship I've had with the books makes everything that much more intense. I'm riding an emotional high right now, and it's late. We'll see what it does to my sleeping.