A lot of folks have asked Staci and I questions about the floor bed. What it is exactly, when to do it, how to do it. I tried to answer them in a post I did a bit ago.
But the most asked question is what do you do if he rolls off. Our first answer was always that we didn't need to worry about it because he wouldn't roll for a while.
But in reality the answer is that the mattress is 4-5 inches tall and there is a rug under it so if he rolls off he'll be okay since it's not long like the carpet. Also if he was able to roll off he'd have the ability to be mobile and get to his back.
That's all in theory...on Mother's Day we were finally able to answer the question in practice.
We ran upstairs to find him about 3.5 feet from his bed and happy as he could be. We had only left him for 2 minutes...and we have no idea how he got like this. When he rolls over he rolls towards the wall...I had never seen him roll to his right (until later that day.)
I wish we somehow got the incident on video because I'm sure it would have been great.
Anyway the answer to "what happens if he rolls off?" is we run upstairs to find a happy baby.