I work for a small internet provider. The head of the sales department calls and says, “Open the fan in the outlet at our office, the girls say it doesn’t work.” has arrived. Where is? In the kitchen. I approach: the fan is noisy, the air is suffocating, everything is okay in general. The boss says so. She sends a girl who actually noticed the breakdown to see. He approaches, looks and says:

So he does not work.

How is it? I say.

I don’t see how it turns.

I turn off the fan - it stops, the blades become visible, I turn on again - they disappear. Nothing more had to be explained.