Techly have posted a video they attribute to NASA.
It shows ISS astronauts looking at a fidget spinner floating in space and grabbing it. After a jump-cut, they are shown tumbling (rotating along all sorts of axes, not necessarily the same as the original spinner.)
To me, it looks like a joke, but Techly are taking it seriously:
While most of the adult population on Earth still can’t comprehend why fidget spinners exist at all, astronauts on the International Space Station use them to demonstrate Newton’s laws of motion.
In the the video posted on Twitter over the weekend, the team of astronauts show the transfer of momentum from the fidget spinner to their bodies in a series of amusing tumbles – they also put the toy in a spin and left it floating in zero gravity.
When each astronaut holds the centre bearing, the energy from the spinner transfers to their mass and makes their bodies flip around the spinner.
This is a joke, right?