Are You Shaking the Couch?

Last night, we were sitting in the Goldfusses' living room and talking when I felt something funny. I asked my wife, "Are you shaking the couch?" Actually, it was an earthquake. It only lasted about thirty seconds or so and things were gently rocking back and forth. According to reports, the epicenter was quite a distance away on the Pacific coast, but it was felt all the way here in Mexico City.