Counter-current high performance training - GIF

Counter-current high performance training.

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Previously:

Apollo astronaut survivalist kit and training - photos
Dog CPR training - GIF
East Japan Railway Company mini training vehicle - GIF
Figure skater spinner training machine - GIF
Firefighter training stairs - photo

New version of an old story - Sisyphus

Attachment 49694

I bet if they put knives at the discharge end he'd keep up with the flow!