Rolling Over

I was finally able to capture Ethan's skills on camera. He's so funny though, he will only roll over once a day. After he does it once, I'll put him back on his tummy to see if he'll do it again, but no luck. Even if he rolls over in the morning, if I try to have him do it again in the evening to show Lonnie, Ethan will have nothing to do with it. How weird is that?