I came across an article from the Redhat Magazine RSS feed about XKCD. XKCD is a webcomic, poorly drawn and with an interesting sense of humor. To give you an idea the warning on this page goes like this:
Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors).
While some of it goes over even my head there were two in particular, that seem to have to do with an inside joke, that made me laugh so hard I almost cried.