Anecdotal and maybe evidence of paranoia but maybe interesting... Out in rural Thailand and needed money. Found a Lotus with 3 external ATMs. Different banks. I was in a hurry and left my phone in my car. At first there was nobody around. First atm had an out of order sign. I choose the next which was SCB. While I was using it a woman went to the third. I went through the entire transaction up to the "get your cash" step - machine made noises but no cash dispensed. The same thing happened to the woman at the next machine. I went back to my car to get my camera to get pics of the ATM number and in the 20 seconds that took a while crowd of people had appeared around the machine. I was upset and in a hurry so didn't think about it until later.

Maybe some kind of scam where they jam the door and then do a transaction and pull out your money too? Or just weird coincidence?

By the time I looked at my bank the charge was already reversed.