Asklemmy

All electrical components contain magic smoke that was put into them at the time of manufacture. If that smoke is released, it doesn't work anymore.

Some broken or malfunctioning machinery respond to incantations projected with emotion. Cuss a machine hard enough and it will start working again.

Another one I've personally experienced, but don't know of any studies for: the main casting of machining equipment such as mills or lathes is a big crystal with unique properties. Each machine has different frequencies it resonates at when cutting. You can hear and feel the vibration when cutting and tune the machine/program for more efficient cutting and tool life. Sort of like taking a guitar that is out of tune and tuning it to a pleasant chord. Two identical machines will need different tunings. This tuning can change over time due to wear, temperature, humidity or maybe the phase of the moon.

Unrelated to machinery: there are mountain lions in the deep south in the deep woods. I had one check me out once. The state wildlife agency denies the modern existence of mountain lions and I didn't believe in them until I was face to face with one. I had to growl and hiss at it to convince it that I wasn't interesting.