Interesting. A wave from nowhere rushes through the cave; a cave that seems well lit. Perhaps that’s just more artistic license. This sequence could have displayed some real drama, had the cave been dark and we could only see indistinct forms, thanks to the helmet lights.
But once again, any sense of actual drama is trivialized. To make the point, Rivera organized today’s strip in a joke-a-day format, as she often does (panel 4).
The Daily Trail 
Mark’s caves always have abundant bioluminosity. Perhaps the fetching Caria will make an appearance.
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Ah, yes, Caria of the Bats Cave. Fun memories, indeed. She sure needed to do a lot of stretching. Well, perhaps our missing movie director isn’t really “trapped”, after all.
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