Etta rolled over!

Two days after her 4 month birthday, Etta rolled over!  Granted, she has rolled over once or twice before, but only out of sheer luck, I think.  Before, she was just so mad that she arched her back, screamed, and flipped over.  This time, I think it was a true roll!  We were watching a movie with the boys and I laid her on her tummy.  I looked up at the movie, and when I looked down, she was on her back.  She had this look of "what the heck just happened?" on her face.  Way to go, Etta!  You are growing up so fast!