Rolling Over from Tummy to Back!!

Ian rolled over for the first time this afternoon, just one day shy of 3 months. I had just changed his diaper and he seemed content and so I decided to put him on his play mat for some tummy time. I put him down and as I was standing up to his left side, he looked up at me and boom, he was over and on his back. I was surprised and excited but wondered if maybe I had put him down a bit on his side. Prior to today, he hadn't shown any signs that he was even close to rolling over. And so I rolled him back over onto his tummy and made sure he was on his tummy. And sure enough, 1 minute later, he rolled over onto his back! So it's a real milestone! I couldn't get Ian to repeat it for a third time. He got frustrated and tired with tummy time after awhile. And I couldn't get him to do it tonight when daddy got home. He was just too tired. But I'm hoping my husband will see him roll over soon enough! Maybe tomorrow morning...