It is just an opinion and a prevalent opinion. Prevalent opinion is not exactly a source of wisdom.
Are you kidding? 500 BPS in a day, which no central bank have ever done, would break the world. The credit markets, the bond markets. The USD. It would all go to total shit. People's borrowing rates would jump so high so quickly they could not meet the obligation, and now we get defaults on VAPR loans. Housing would become utterly unaffordable for most people. Forget about the companies doing business overseas...
It would be ecomageddon.