On the GQ thread on “What killed hats?” the Snopes article links to Clark Gable and the demise of undershirts:
http://www.snopes.com/movies/actors/gable.htm
The good: this is declared undetermined; the arguments that Snopes use on qualifying this claim a legend are good, however: this last paragraph is bad IMO:
Not so fast!
I do remember, several years ago, that on PBS(?) several interviews with Frank Capra were shown. In one of them -I am sure- Capra described how the missing undershirt really happened: in previous takes Gable DID use an undershirt, but Capra realized that for timing effect, Gable was taking too long on getting to the bare chest level, so he told Gable to not use the undershirt! I remember that indeed, adding an undershirt would have made the scene longer, I do think Capra -at least- deserves a mention in this “Legend.”
Of course, now I need to confirm this, anybody here remembers those documentaries/interviews and the name of them?