Question

And if you have any doubt you must not have seen a dog rolling on his Bat tongue lolling about head switching back and forth screwed in first one way and then the next as of competing in a silly Worm dance what is the main idea of the sentence

Answer 1

the last one

Step-by-step explanation:

Answer 2

To answer it precisely correct, I would have to know the context which the first sentence refers to ('...and is you have any doubt...'). But everything that comes after it, serves simply to illustrate a really silly situation. It deliberately has nothing to do with the context, with the intention to emphasize a point of view/opinion, while giving the text a certain humorous content. It's a common writing technique.

The previous context probably has something to do with pointing out the silliness of some situation or behavior, right?