I googled "died while meditating" and found this dude: http://en.wikipedia.org/wiki/Luang_Pho_Daeng http://en.wikipedia.org/wiki/Luang_Pho_Daeng who not only

I googled "died while meditating" and found this dude: http://en.wikipedia.org/wiki/Luang_Pho_Daeng http://en.wikipedia.org/wiki/Luang_Pho_Daeng who not only died while meditating in a lotus position, but supposedly failed to decompose afterwards. (I don't know whether it was a heart attack though...)