Or, at least, shocked and horrified.
That is, if you were a denizen of the Newsflesh-verse.
The series, launched in 2010 by Orbit Books, is written by Mira Grant (aka Seanan McGuire) and explores multiple aspects of the world during and after a global zombie outbreak. The main trilogy focuses on the Mason siblings, bloggers who are following a campaign tour twenty odd years after the initial Outbreak.
The SDCC specific story, The Last Stand of the California Browncoats, takes place in the summer of 2014, during preview night. You can’t stop the signal, you can’t stop determined fans, and you can’t stop the zombie virus.
If you’re already at the big San Diego show, I can’t recommend reading while there; the close quarters and crowding will make Grant’s compelling storytelling hit a little too close to home. But once you get home, or if you’re not there, the novella is a good way to dip a toe into the Newsflesh-verse. Mind you don’t get them bitten off.