As a jet was flying over Arizona on a clear day, the copilot
was providing his passengers with a running commentary about
landmarks over the PA system.
"Coming up on the right, you can see the Meteor Crater,
which is a major tourist attraction in northern Arizona. It
was formed when a lump of nickel and iron, roughly 150 feet
in diameter and weighing 300,000 tons, struck the earth
50,000 years ago at about 40,000 miles an hour, scattering
white-hot debris for miles in every direction. The hole
measures nearly a mile across and is 570 feet deep."

The blonde sitting next to me exclaimed: "Wow, look! It just
missed the highway!"

That's what I call a groaner :-)