Which scenario? The first or the second? Or do you mean neither can happen?Trust me when I say this. The above scenario will never, ever happen again, ever.
I think a post-1989 Japan scenario is possible—interest rates back to zero, or near zero, or negative; QE; expanded QE to include equity ETFs either directly or by proxy. That is, the Fed may follow the BOJ post-bubble playbook.
And your point is?***
Hell, since the market reopened an hour ago, we already have a 10-point range in ES.