I didn't dream and I made a video to prove it so this is not an April fool's joke.

It could have been a fluke but recently another HES pulled that trick on me so I had to post this and ask you all guys : WHY ?

The most logical explanation would be a step-up charge pump for internal bias but then WHY would that voltage appear on the output pin ?

Are there reports of weird voltages in the wild ?

This can be very dangerous, for example if the pin is directly tied to a Raspberry Pi GPIO...