Someone dumped over 100 million Dogecoin on Cryptsy and price went down to 99 satoshis briefly. I don't think it was the Dogevault hackers cause Doge is still in the mega 121 million + wallet, but probably someone suspicious. No real investor dumps that hard and loses money.
But that's a good example of what will happen when these coins are dumped, 3-5 satoshi drop.
It was probably WafflePool. I thought those guys had moved on after the last halving, but they sure seem to love mining the doge.