100 people doing something at the same time has far more power than 300 people doing it over time.
We unconsciously amplify the power of coordination when we consider the impact of actions. If there's a thousand people waiting outside of a store, we instantly believe we're seeing a phenomenon.
While the internet makes it easier than ever to spread ideas, it makes it far more compelling to coordinate actions.
If everyone in your weekly meeting drops a pencil at precisely 12:03, you'll notice.