This sounds so much like something you'd see on a reality show... pranking people to make them think there's someone stuck inside the ATM.
Customers at an ATM in Corpus Christi got a scrawled message along with their receipt, say "Please Help. I'm stuck in here, and I don't have my phone. Please call my boss."
But the note was legit... the guy was stuck... and thank goodness, someone called the cops!
I would have totally freaked out, on the spot. Let's just say the 911 call would have gone viral!