By any measure, Twitter hit particularly rough conditions on Tuesday night, which sent its share price into a tailspin.
At one point in the final hours of trading, the stock had lost more than $8bn (£5bn), or 25% of its opening price.
It seems investors were spooked by the early and unintended publication of earnings results that should have been presented after the markets had closed.
So how did that happen, and why did it result in Twitter's worst day on the markets since its flotation?
How come Selerity got the news early, and who are they anyway?
This is the interesting bit.
Selerity is a tech start-up running a very specific service catered to investors.
It automatically scans all sorts of documents, press releases, and social media online and looks for anything that could prove useful to investors.
It then reports back to subscribers with what it describes as real-time actionable intelligence.
In this case, it picked up the early Nasdaq posting.
The company then tweeted the figures under the hashtag '#breaking', ensuring that the world and his dog would know of Twitter's failings through its own service.
Selerity then tweeted its source, adding to Twitter's embarrassment by making it clear that the results had been neither leaked or hacked.
Shares in Twitter lost 6% before trading in the stock was momentarily suspended.
When trading resumed, the stock plu.