There have been quite a few instances when a mass gathering of human beings, bouncing in unison at a live music event, has caused the ground to literally shake. Often, this underfoot rumbling has been felt by people nearby - triggering fears that something on a seismic level was taking place.
There’s been some notable examples over the years, from the Bass Center festival’s thumping low-end being felt five miles away, to Taylor Swift’s Era’s Lumen Field show in Seattle causing actual seismic activity to be registered by scientists.
