If your baby is anything like mine he or she will make a great number of noises throughout the day and night. Most of these sounds will be in the grunt family of noises. A few sounds will probably belong to the coo and ahhhh group. However, as the baby reaches a few months you may hear something that will freak you out. I submit to you the sleep laugh. What is LTD dreaming about that would make him laugh out loud like Nicholson in The Shinning? The sleep laugh is accompanied by the sleep smile and as quickly as it arrives, it departs. The greatest feature of the sleep laugh lies in the fact that no one but you will experience it and so it becomes a unique memory. Enjoy while you can because in the future, his awake laugh could be because he is embarrassed of you.