I'm told from within the industry the perception is that companies that aren't engaging with social media are seen as being scared to interact, and are regarded as being out of touch with their customers and modern technology.

BBC: Does social media work for train companies?

For a trade to be broken the stock had to have moved 60% from its last price within the 20 minute window between 2:40 and 3:00 p.m.

FORBES: Some Agreement on Speed Bumps for Market Panics