Who wrote he fell thunderously?

The phrase "he fell thunderously" is not a famous quote or title of a work. It's a common, descriptive phrase that could be used by many different authors.

To find the author who wrote this exact phrase, you'd need more context:

* What book or story is this from? Knowing the title or a few more words surrounding the phrase would help narrow down the possibilities.

* What is the genre of the writing? Is it a poem, a novel, a short story, etc.?

Without more information, it's impossible to pinpoint the author.