I read it, twice, and the distance between "UWB environment" and "dog stomach" was enough that my pitiful excuse for a brain didn't recognize it after 30 seconds, and required reading this comment to realize what it meant.
HN tends to assume a ton of charity in the comments section, "did you read..." style comments are highly discouraged
Also missed the Groucho Marx reference, "Inside of a dog it's too dark to read." Which is definitely true when you're depending on UWB to provide "light".