What's the Deal?

Last night after Brock got into his jammies, I looked away for a second and the next thing I see is his arm sticking out of his neck hole. I have no idea how he got it out since they were zipped up to his neck. I wish I could have seen him do it! Then this morning when I went to get Jillian out of her crib, I see she has her arm out of her jammies! I have no idea how she got her arm out either!