Back in 1999, the Matrix was a groundbreaking film in many ways—including its special effects, for which it won an Academy Award the following year. The most memorable scene was when the main character played by Keanu Reeves dodges bullets—the camera circles around him as he seems to move in slow motion:
Since then, this special effect called "bullet time" has become pretty common in action movies. To produce the bullet time effect, cinematographers set up an array of cameras that take photos sequentially or at the same time, depending on what the shot entails. Then afterwards the images are compiled to make one continuous shot.
This array setup has been around for a while, dating back to the early photography experiments by Eadweard Muybridge in the late 1800s. And while setting up dozens—or even hundreds—of cameras and firing them all at once isn't hard if you're a director with a multi-million dollar budget or even a hobbyist with a big budget for new cameras, so far this technology has not become easily accessible to the average person who wants to take a #NeoSelfie.