crazy early!

So this morning my newborn (he'll be one month old on Sunday), ROLLED OVER. I had placed him on hus tummy for tummy time on our king size bed. I turned around to put something on the dresser and when I turned back he was on his back. I thought I was going crazy for a minute and maybe I had initially placed him on his back. I yelled for my 3 YO daughter to come in the room and I put him back on his belly. We both watched, and sure enough he rolled himself over. I tore my husband out of his man cave and wee one did it again! Lord help me if this child starts walking way early!!