At 4:00 this morning, my entire apartment building shook back and forth plus there was a rumbling. I checked and made sure it wasn't a giant oak crashing into the building (like last time). No one was screaming and there was no commotion. Sufficiently creeped out, I couldn't fall asleep.
The second I got into work, I checked Boston.com. Nope, no reported earthquakes. Either a huge truck raced down my street or my inner ear is completely screwed up.