I used the slit-scanning technique on some people practising sport on a Sunday morning, over around 2 minutes.
Slit-scanning is a complicated idea to explain, but essentially one vertical slit of the scene is recorded through time. Effectively, the horizontal axis of the photo represents time.
I don't have any extra technology to help me with slit scanning, I used Adobe software to process a video.
My main inspiration was Jay Mark Johnson.