In a TOEFL conversation, the professor said: "If you're a copper miner, you won't lose any sleep should the penny get – if you'll excuse the expression – pinched out of existence."
I am confused by the use of "should" here, as a proper way I would think of is to put "should" after penny – you won't lose any sleep the penny should get – so why is it the case?
By the way, what does the professor mean why he said "the penny get pinched out of existence”?