By: Trevor Chartrand While entertaining and informative, Happy Happy Joy Joy: The Ren & Stimpy Story is a documentary with two very different and almost contradictory goals.  On the one hand, the film takes a mostly light-hearted look at the making-of a beloved animated series.  But on the other hand, however, the doc is also a dark character study featuring the disturbing behaviours of Ren and Stimpy’s show creator, John Kricfalusi.