I had last used a lathe 30 years back. Working in the offshore oil industry I needed to cut some metal for a spare part to fit. I asked the chief engineer if I could use the workshop lathe. He came with me to see if I could use one. I managed to work out how to set the correct speed, choose and set up the cutting bit. I then inserted the job in the chuck, remembering not to commit the all important rookie mistake of forgetting the removal of the chuck key before starting the lathe.
I started the motor and just couldn't remember how to engage the feed. I had told him I last used one 30 years ago, We both laughed when he pointed to the feed engagement lever at my knee.