You're sitting on the Red Line, reading the paper, minding your business, and then next thing you know you're the only one with pants on! Why? How? Do you take off yours too?

That's the conversation you'd be having if you didn't know what was going on. I'm here to tell you about what is going on.

Back in 2002, Improv Everywhere in New York started an annual global event where they would get on the train, drop trout, keep a straight face like nothing's wrong, and enjoy the ride in your skivvies. Since then, other cities have begun to follow in their footprints. Chicago being one of them.

You don't need to dress in costume, in fact, it's actually discouraged. Just make sure your private areas remain private and covered. Everyone boards at the same location, takes their pants off, and tries to keep a straight face till the end of the ride. That's all there is to it. They do have prizes to give away for those participating and an after party for all who want to go. Grab all the details on their Facebook Page