What in the hell is going on with Coinbase/GDAX right now?
OMG!!!!!!!!!!!
It is called pre-announced scheduled maintenance.
OMG!!!!!!!!!!!
OMG!!!!!!!!!!!
OMG!!!!!!!!!!!

No, it's called a colossal fuck-up that resulted in a flash crash on GDAX.
You seem to be exaggerating.
In this case, GDAX completely cleared its books - so when it came back online, there would have been no orders... and yes, I see that there appeared to have been some kind of selling all the way down to $.06..
Would have been nice to pick up a few BTC at those kinds of prices...
I would not call that a "colossal fuck-up." because they came back online as scheduled... the order situation seems to have been some kind of aberration based on a thin order book..