Both 82-8000 and 92-9000 are at it.
https://globe.adsbexchange.com/?icao=adfdf8
https://globe.adsbexchange.com/?icao=adfdf9
>But is it really happening or is ADS-B just having some fun?
>Lots of fuel being spent if this is real.
Was watching instantaneous height changes of thousands of feet so it is someone playing with the tracking data.
How else do you get the colour changes to draw the picture.