Owen has rolled over from belly to back a handful of times since he was about two and a half months. I think those times caught him by surprise. Now is working on rolling from back to belly. He lays on the floor and rolls over onto his sides and then just lays there.
Well last night I put him to bed, on his back of course, and I woke up this morning to find him laying on his belly.
Owen did his first roll, and mommy missed it. Oh well, it was exciting.