Approximately 10:30 p.m. Fri. May 22.  My girlfriend and I were entering our car parked on the corner of 14th and Q Streets after enjoying some portabella and tofu burgers at Burgers and Brew.  A loud crack rang through the night air drawing my attention.  Seconds later a second crack followed, this time louder.  I surveyed the street wondering if I heard a minor car accident when the unique sound of splitting wood occurred. I watched as a branch, at least 15 feet in length with several large branches attached to it fell 50 ft. to the street landing directly on the hood of a car.  We walked around, amazed at what we had just witnessed, when I noticed a sign posted on the street directly