@stephen Ages ago, a colleague of mine took a NAM server to Europe for installation
Prior to turning it on, he jokingly referred to the next step as the « smoke test »
In those days, the power supply had a switch for 110-220v (« convenienly » located at the back)and he had forgotten to activate 220v after arriving
It produced smoke and died.
We had to take a power supply for a similar model and expedite it over to Amsterdam

@stephen When working on hardware projects I had a college professor that would always say "Don't let the smoke out".

@stephen What's pretty funny is that if some Chinese company starts to build your GPLed boards they don't always change things at all. So suddenly thousands of boards are sold with little messages like that 🙂