The Hurdy Gurdy is an instrument that was used in medieval times to make people get jiggy. The instrument itself was made of wood and stringed, as you can see, but how you play it is what sets it apart from most other musical instrument. Well, that and the odd droning sounds it makes while you crank/play it. Not only do most people not know what a Hurdy Gurdy is, most people have never seen one or even heard one (that they are aware of, anyway). Just think, by the end of this video, you could know how to play one. Now you just need to find a Hurdy Gurdy.
Fact is, you bust out a Hurdy Gurdy people will just genuinely have their mind blown that someone actually has one, nevermind if they can play it. That is, the three people who actually know what one is. Regardless, it is good to know everything, so now you can add the Hurdy Gurdy to your vast base of knowledge.