What's the difference between these two pictures? The one on the left was taken by a high-speed camera, while the one on the right was taken by a scanning digital camera (in a phone). You can see the rolling shutter effect in action while the camera scans. That doesn't mean the pictures weren't further manipulated, if you notice the text on the propellor blades.
Destin Sandlin of Smarter Every Day explains the rolling shutter effect and how it happens. Wait until you see what the effect does to a fidget spinner, a guitar, and a spinning coin! -via Everlasting Blort