I got to see Gallows and Saosin, both of whom I really like, so it wasn't a total loss for me. Not to mention the crowd atmosphere is usually damn good, and the moshpits are fun but not overly dangerous. I don't mind getting busted up, but I'd rather not get trampled to death.
Ugh, some of the acts were just sick, though. I left early to avoid hearing 3OH3. I was afraid I'd hemorrhage if I heard them play.