A lady named Melissa was wearing her pet boa constrictor, Penelope, around her neck like a scarf on the Boston metro's Red Line yesterday, when suddenly, "I couldn't find her anywhere." Then she posted a "lost pet" notice on Craigslist.

This is way scarier than Snakes on a Plane.

Melissa told a local radio station that she knows exactly when and where her "harmless" 3-foot boa escaped, because she knows when she stopped feeling Penelope's body around her neck:

There's a small chance that maybe she was left at Park Street and I was just feeling my scarf. But I'm very positive that I lost her in, I think they said car three, between Park Street and Andrew, because I was getting off at Andrew when I realized didn't have her.

So, if you feel something slithering around your neck next time you're riding the Red Line alone in the dark of night, give Melissa a call, OK? [Craigslist via CBSLocal, images via Steve DelRose's Flickr and Wikimedia Commons]