Okay, so this is what I saw when I went in to check on my sleeping baby boy! He somehow gets his arm and/or leg under the bumper pad and through the crib slats. That arm wasn't so bad because I could push it back onto the mattress. Later that day he was screaming and when I went in to check on him he had wedged his leg up to his thigh in this same position. It was fairly tight in there. We haven't figured out how to prevent this yet, but thankfully he has only done it once. Boys will be boys I guess!