Sleeping through the night!

Well, technically that is (5 hours is considered "sleeping through the night" by many sleep experts).  Yesterday night he slept for 6 hours straight (but then was up every 2 hours...) and last night he had two 5 hour stretches (only 1 night waking!).  I have no idea how this happened!  I guess he is just maturing.  I hope this lasts!  I think one thing that has helped is that I have learned the difference between a sleep noise and a waking up noise.  They are very similar!