I can't find it now, but someone ported nommu linux to those cortex-m3 "bluepill" development boards that could be bought for ~$2 (they were built wrong and liquidated for a massive discount).
Seeing the title of this submission reminded me of it because I messed around with it a bit a few years ago.
I think they're describing how you can force the two pins of a europlug into a type-G socket, if you first stick a screwdriver or key or something into the earth pin to open the shutters.
This will give you access to electricity, but the contact area is much smaller than it's designed for (round pins in a rectangular hole), so using it for anything high wattage will end poorly.
An often overlooked part of the BSA spec for type-G sockets is they're supposed to have a flat surface surrounding the socket large enough to prevent you using the earth pin of an upside down plug to do this.