Last night I was awoken by three knocks. Scared, I went to the front door and without touching it, looked through the peep hole. Nobody. Whew! But then I went back to my room scared to sleep but it didn't happen again so I fell back asleep. When I woke up I wondered if that had indeed been one of those hallucinations - except those are isually when youre falling asleep or waking up and this seemed to wake me up. Either that or my neighbors are jerks.