If the previous ATM skimmer posts didn't scare the pants off you, this one from San Fernando Valley, which Brian Krebs reports on, might. It has a near-undetectable pinhole camera for recording timestamped footage of your PIN entry, and apart from that indicator, the only way to spot it is to yank hard on the front of the ATM before you start using it.
A few tips about ATM skimmers and skimming scams. It’s difficult — once you’re aware of how sophisticated some of these skimmers can be — to avoid being paranoid around ATMs; friends and family often tease me for stopping to tug at ATMs that I pass on the street, even when I have no intention of withdrawing money from the machines.
Still, it’s good and healthy to be somewhat paranoid while at an ATM. Make sure nobody is “shoulder surfing” you to watch you enter your PIN. A simple precaution defeats shoulder surfing and many other types of video-based PIN stealing mechanism: Cover the PIN pad with your hand or another object when you enter your PIN.