Let me explain the hysteria over GameStop briefly: GameStop sells video games — which means, like Blockbusters, it was considered kind of past its shelf life. This meant its shares were “shorted” — where investors borrow, then sell, then buy intangible objects — and apparently make lots of money in the process. Anyway, this month users on a Reddit forum decided to rally against those Wall Street bros who’d bet on the price of shares dropping, and invested in GameStop, to drive up their stock price.Yesterday, GameStop’s share price reached $24.5 billion — which, as you can imagine, wiped the smile off a few hedge funders’ faces. We used to be so dismissive of those dudes on subreddits who want to “take on the big guy”. But they literally did it — and they won. Imagine the traffic-calming measures local councils would have to agree to if a Mumsnet thread really got going.