A Little Scare Last Night

We had just a little scare last night and it really upset Shawn and I. When I put him down last night he was O-U-T out! He didn't move a muscle when I laid him in his crib. So it really surprised me when about an hour later he started screaming. I went in and Shawn was already leaning over his crib looking at him. Shawn says, "Something's not right." So of course I panic and say WHAT? He says "look at his arm; it's limp." He was right. Aiden looked really scared, one arm was trembling and the other arm was perfectly limp. I swooped him up and bawled!! I was so scared he was having a seizure or something. I put the binkie in his mouth to calm him down and he went right back to sleep. His arm was moving fine and he was perfectly content. We were freaked. What happened? Shawn thinks he must have rolled onto his arm and it fell asleep, which woke him up. The poor little guy must have been so scared. He's never felt that before. And hey, it freaks me out when one of my arms or something falls asleep so hard I can't move it. I'm just glad he was OK.