In March 2012, MuckRock made a request to FBI for files FBI prepared on Richard Feynman and in response to the request, FBI provided a 361 paged document. Though a significant part of this has been redacted, but it still is an interesting read. The document can be found here.

On page 64, there is something which is both interesting and shocking and this has to do with his divorce from his second wife as it throws some light on why his wife went for divorce:

…the appointee’s wife was granted a divorce from him because of appointee’s constantly working calculus problems in his head as soon as awake, while driving car, sitting in living room, and so forth, and that his one hobby was playing his African drums. His ex-wife reportedly testified that on several occasions when she unwittingly disturbed either his calculus or his drums he flew into a violent rage, during which time he attacked her, threw pieces of bric-a-brac about and smashed the furniture.