In smaller planes with mechanical adjustable seats instead of electrical there have been several accidents due to the seat moving unexpectedly.

So much that the FAA has made regular inspection of the seat rails mandatory for a long list of Cessna models: https://www.federalregister.gov/documents/2010/11/08/2010-28...

Well if you’re holding a yoke and the seat moves forward you’re likely to push on the yoke