In the form of an earthquake:

It hit just some 50 miles off the coast of here with an estimated magnitude of about 6.9, and woke me from my slumber around 5am-ish. At first I thought I was going crazy, since I was just woken up and everything
seemed to be moving...which turned out everything WAS moving. My dogs were going absolutely nuts.
Anyone ever woke up to something like that, which makes you question reality as you wake up?