The Raunchy Bill Watterson Artwork You Probably Haven’t Seen Before

Calvin and Hobbes' Bill Watterson and Bloom County's Berkeley Breathed have a decades-long friendly feud. Where Watterson is principled and reclusive, Breathed doesn't mind merchandising his creations, and can't say no to a good convention appearance.

In a 2010 Comic-Con panel, Breathed showed off some original Watterson artwork that had never before seen the light of day - because they were private missives roasting Breathed into oblivion.

This is what happens when 90's-era comic artists stop being polite... and start getting real: