There’s something strange in the neighborhood — and it isn’t a horde of ghosts.

Starting on the 4th of July and lasting until 8 p.m. Tuesday (local time in select cities), pink mustache-wielding vehicles will go ghost through a Ghostbusters and Lyft cross-promotion offer. Users of the ride-sharing service in New York City, San Francisco, Los Angeles, Boston, and Washington D.C. can “toggle into Ghost Mode and request a free ride in an Ecto-1 car,” according to a Lyft press release.

Ecto-1 cars will be in limited availability, of course, so you might be waiting around a bit before one opens up for a ride. The offer, made to promote the classic film’s reboot in theaters July 15, will include both original Ecto-1 cars from the new movie as well as replicas.

Ethan Eyler, Lyft’s Innovation Brand Manager, said in the release that the company is thrilled to see such a classic film franchise return to theaters with an all-new cast and characters, and are equally as excited to team up with Sony Pictures to bring the movie to the streets.

“Lyft loves to surprise and delight passengers with fun, memorable in-car experiences,” Eyler said. “Following the success of Back to the Future Mode, Zombie Mode, and Prank Mode, we expect this to be the best yet.”

Aside from the free ride in a sweet car, Lyft and Sony are giving users the opportunity to win “in-car swag and giveaways, such as Hi-C Ecto Coolers and Ghostbusters-themed Twinkies by Hostess.” Grand prize awards include tickets to the Ghostbusters premiere in Los Angeles on July 9.

Sony President Dwight Caines joked in the release that in order to hitch a ride in the Ecto-1, you’d have to be a Ghostbuster.

“Ghostbusters is a great experience for all audiences, and now, with this amazing collaboration with Lyft, moviegoers of all ages all across the country will be able to experience that feeling of being a Ghostbuster. No matter the destination, Lyft riders using Ghost Mode will be arriving in style.”

Watch the Ghostbusters trailer