Have you seen these dancing men? (Photo: YouTube/OMaster92)

D.C.'s newest musical act has debuted on its trains. Independence Day inspires many emotions in Americans, but a few have been motivated to bust a move on the Washington D.C. Metro in the last couple days. Meet the so-called "Metro Party Boys," a group of what seems to be 10 guys from around D.C. who enjoy dancing and singing on Metro trains across the District. Several videos have emerged this week to chronicle their song-and-dance routine for our city's commuters. It's a vision of white T-shirts, khaki shorts, a whole lot of clapping and whooping, and many seated commuters whose reactions veer from baffled to smiling.

So far, all the videos date to yesterday and today — perhaps patriotism inspires these Metro jams? I'd say this looks like what may be the best Fourth of July prank ever. The dancer-uploaded videos seem come from an account called OMaster92, which tells us: "Couple of my friends, decided to make the metro ride fun for everybody." The YouTube account also lists the 10 Twitter handles associated with the dancers. Consider their Fourth of July video here:

And look at these videos, also from this week, which show the Metro Party Boys singing "Hakuna Matata," that classic song from the Lion King, as well as pulling from the stylings of Miley Cyrus and Cee Lo Green. Just who are these transit-enthused dancing men?

I called Metro's PR office, and they had no idea who the Metro Party Boys were either. They seem to have magically appeared over the past 48 hours.

Not all dancing has brought joy, however. In this video uploaded yesterday, Metro Transit Police appear to break up the mirth. I suppose the amount of jubilant dancing would be considered a disturbance for some riders. I've seen them dancing alongside baby strollers and children. If I were a transit officer, I'm not sure how I'd react to this medley of Metro dancers singing a tune from a Disney movie.

Other videos are out there if you look, such as this longer eight-minute video showing the Metro Party Boys gearing up for a train dance. Here's a glimpse into how their showmanship evolves over the course of a Metro ride. I've spotted Farragut West and Arlington Cemetery stops listed in the different videos, so I'm guessing they've stayed mainly on the Blue Line, but I have no idea. Have you seen these men around?

The crew of Metro Party Boys has been actively celebrating what may be a Fourth of July prank for the record books on Twitter. Hopefully more details will emerge soon. I'd love to talk to any of the people involved.

Update, 3:10 p.m.: The mystery Metro dancers have been unmasked. Read all about how their Independence Day antics began here.