"I waited 10 minutes after the open to give the panic sellers a little time to dump, then I saw CIEN was just under $19, down about 13%. Wow. I bought a bunch of that and sold it later in the day for a near 10% gain, and I'll keep an eye on it for future weakness."

Ciena got upgraded this morning, it is up 5% at 21.59.  Sure begs the question if that flash crash was deliberate or just pure coincidence, right?  Nah, there is no manipulation in the stock market!  LOL