Give me a normal lock and I'm through it or into it without a second thought. But the high-security stuff, the strange old mechanisms, the ones built to beat people like me, those still stop me cold. I'll stand there working it for an hour, and it just sits there quietly winning.
More people experience this than they realize.
You can handle ordinary locks, but the high-security and unusual ones still stump you.
If this sounds familiar, the Library can help you find the bigger picture.