Calvinball. Calvinball, as many would claim, is both pre- and post-cursor to Junkyard Sports. I exemplify:
In this episode (one of only ten I was able to find on the remarkable collection of C&H strips found on Calvin and Hobbes at Martijn's) we see the following: [Funlog]
mmm calvinball…. I'm in the red zone, so you can't tag me until i say the word red, darn!