I agree with @twinmamma2015 my baby gets scared sometimes because it's too quiet or he can't see anyone, but I've you pick him up or talk to him, he's completely fine (:

sometimes I think they do. every once in a while my boys will cry, I go pick them up and they are out like a light as soon as I get them. it's like ok I know mommy isn't far. they don't wake up to eat or need a diaper it's just making sure I'm close by.