 Watterson explains that he adapted this jargon (and similar examples from several other strips) from an actual book of art criticism.Overall, Watterson's satirical essays serve to attack both sides, criticizing both the commercial mainstream and the artists who are supposed to be "outside" it.The strip on Sunday, June 21, 1992, criticized the naming of The Big Bang theory as not evocative of the wonders behind it, and coined the term "Horrendous Space Kablooie", an alternative that achieved some informal popularity among scientists and was often shortened to "the HSK."