Right here: http://ignatz.brinkster.net/cimages/cbreathedsketch.jpg. According to Comic Strips / Take That - TV Tropes, there is a Take That related to Calvin and Hobbes, although not in the strip itself. For strips in Bloom County that parodied cartoon cats that featured characters such as Garfield and Hobbes, Bill Watterson retaliated hilariously with this comic. In response Berke Breathed said this:
"I have committed other thefts with a clean and unfettered conscience. Garfield was too calculated and too successful not to freely raid for illicit character cameos. Calvin and Hobbes was too good not to. Calvin creator Bill Watterson took these thefts in stride and retaliated in private with devastatingly effective illustrated salvos, hitting me in my most vulnerable places. Bill's sketch is an editorial comment on my addiction to the expensive sport of power boating and the moral compromises needed to fund it. That's me doing the kicking. The chap on the dock represents my cartoon syndicate boss, which says it all, methinks."