Is the zombie apocalypse upon us?
After seeing these chalk-scrawled warnings all over the Slope, I had to go to
the Tumblr site [http://parkslopezday.tumblr.com/] to see what was up. Turns out
that the Park Slope Academy of Brazilian Jiu-Jitsu [http://psabjj.com/] (located
on 5th Avenue and
