I'd add UK mains plugs[1] to that category. I've seen multiple people compare them to caltrops, and for good reason. [1] Photo for reference: https://en.wikipe

I'd add UK mains plugs[1] to that category. I've seen multiple people compare them to caltrops, and for good reason. [1] Photo for reference: https://en.wikipedia.org/wiki/File:Moulded_and_rewireable_BS_1363_plugs_(horizontal).jpg https://en.wikipedia.org/wiki/File:Moulded_and_rewireable_BS...