Camera Technique Stretches Time

An unusual camera technique developed by Jay Mark Johnson combines multiple viewpoints and moving objects into a single image with a stretched background. 

The slit-scan camera technique, which he calls "photographic timelines," freezes and compresses moving objects. The faster they move, the more they're compressed.

This is the reverse of what we're accustomed to seeing, namely detailed, stable backgrounds with blurred moving objects.

Johnson's technique also works wonders with dancers, distorting their forms like melting glass or taffy.

Via Singularity Hub
Explanation of the method on Design Boom.
Jay Mark Johnson's website