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..
Except for the fact that they fucked up both 1broker and bitmex customers. Luckily for them their losses are going to be compensated by the owner from their pockets.