Reader Hanji alerts us to a hack pulled off when Randall Munroe, author of the popular webcomic XKCD , spoke at MIT by invitation of the Lab for Computer Science. MIT hackers dropped hundreds of labelled playpen balls onto the audience from hatches in the ceiling. The labels bore XKCD's logo as well as the recently discovered 16-byte AACS processing key. At another point in Munroe's talk he was stalked by remote-controlled mechanical velociraptors; but fortunately he had been supplied with a squirt gun full of grape juice.