how about stumbling into a hidden part of a cave which is actually a cineplex showing Titanic with demons, imps, & all sorts of underworld populace watching? now THAT is hell.
or maybe a mobile cybecafe (like in korea) where some of the Larians are playing DD2 multiplayer?
or kirill conducting an orchestra in a lavish auditorium with forum members as musicians?
or maybe a scene from Monty Python's holy grail where a killer rabbit is on the loose & kills knights & paladins & the king RUN AWAY !!!
easter egg can be made to be some sort of tribute to great games, movies, or anything. much like what fallout does for easter egg.