Sorry guys (my fellow bay area residents), but that was my fault. (no pun intended.)
See, I was driving back from Monterey with my gf and things got a little... interesting around Gilroy. I mean, I knew I was good, but I had no idea I was *that* good. So, if I caused any damage in your house or gave you a scare, I apologize.
In all seriousness, that was actually my first earthquake since moving here from Boston in 2000. I live in the Foster City area and it was quite a jolt for me. I know it was "only a 5.2" but it was also a very shallow quake which is why it was felt so strongly so far away.
The most eerie thing is that it was nothing like what I expected it to be. I always thought there's an initial "pop" upwards and then audible rumbling. There was no pop, and there was no rumble. In fact, it was very quiet until my house started creaking and groaning. At first I thought it was a passing truck, or one of the red-eyes leaving from SFO. (They often take off over Foster City at night.) But, as it progressed, it got stronger and stronger, and since I couldn't hear a truck or a plane, obviously, I became very agitated. I actually ran to a doorway, then ran out of the house. I would be just fine if I never experience another earthquake.