Rough Naptime

Last week I heard a little fussing during one of Holden's afternoon naps. I let him fuss and within a few minutes he was quiet again. I went in to check on him once I was pretty confident he was sound asleep. This is what I found:
I always put him on his tummy for naps, but I guess he just couldn't get comfortable. But this just DOES NOT look so comfy to me.