Garkov replaces the text of a few Garfield strips with text in Markov chains, “a probabilistic model well suited to semi-coherent text synthesis.” I’m not sure exactly what it means, but it’s semi-random and completely weird. Here are a few good ones I turned up.
If you get a good one, you can’t just “save image,” you have to take a screenshot; the text is not part of the image so you’ll get a blank one.