I have come across a lot of people with cracked heads !
Like all the Irish fiddlers who are too mean to buy a good instrument.
I did meet a player many years ago who just about wrecked an Amati playing the " Four Poster Bed " , I think it was called, not knowing what he had !
Oooh, that’s scary. And if it’s “The Four Posts of The Bed” jig I’m thinking of, I could almost see how – it’s a rodeo ride!
Now that you mention it … I must begin scheming to get my fella to play it more. With luck it would wreck his fiddle, too. 
Lord, I am so not fond of that fiddle!