Just a thought but the last 3 incidents like this I have seen have been with 1911's and high end ones at that. I would assume they have some well tuned light triggers as well.
I just cant see this happening with a Glock or a double action pistol. Not saying it doesnt happen but it takes quite a bit more pressure to set off a Glock or most double action triggers as compared to the 3 pounds that some of these 1911's have on em.
Just an observation.
I love my 1911 and they are one of my favourite style of pistol but as a carry gun cocked and locked just doesnt seem safe to me at all.
Don't worry I have my flame suit on!