Having said i'd never heard of such a thing as a jazz injury shortly before our trombone maestro Sir Fitroy Callow fell down the Volupte stairs, I've just thought of another jazz injury:
I've got one front tooth that is yellower than the other. My dentist told me that it is actually dead because I've knocked it.
It took me ages to figure out when I'd knocked my front tooth. And then one day I got over excited while I was singing at a gig and whacked my teeth on the microphone - and remembered that I'd done that quite often before in the past.
So there you have it. My jazz singing has actually killed one of my front teeth.
Who'd have thought jazz could be so perilous?