https://www.ifixit.com/Answers/View/83058/Why+does+my+bike+change+gears+at+random
SOLVED: Why does my bike change gears at random? - Bicycle - iFixit
Kristopher, What you are describing is called "ghost shifting." And it is annoying. If you have the rear derailleur adjusted properly, perhaps you have a bent...
my bikechange gearsat randomsolved
https://www.riken.jp/en/news_pubs/research_news/rr/8180/
Single-atom lasers change gears | RIKEN
RIKEN researchers show that single-atom lasers, which emit one photon at a time, are able to switch between two activity regimes
change gearssingleatomlasersriken
https://javct.net/v/cjod-400-sub
CJOD-400-SUB Super Teasing Temptation With 1mm Cloth! Pan! Pan! Change Gears After Rubbing The Big...