
If you couldn't explain that before now, it's really no biggie—unless you're one of the people Jimmy Kimmel tricked into pretending they thought the equinox is a dangerous natural phenomenon.
To celebrate the autumnal equinox on Wednesday, Kimmel sent out one of his correspondents to ask people if they were prepared for a "5.5-magnitude equinox." Obviously, this was total nonsense, but that didn't stop people from blithely explaining why you should dig a tunnel to escape the perils of an extra-strength equinox.
Screengrab via Jimmy Kimmel Live/YouTube