Careful...it's addictive...

A baby's laugh is just like crack cocaine. Once you
get it, you just need more and more and more. You
become a crazed lunatic...trying to figure out what
you did to make it happen and how to make it happen
again. Luckily, Jack is pretty easy. Put a box on your
head. Bounce him on the bed. Show him his reflection
in the mirror. Stick out your tongue. He's an easy
crowd. I haven't even had to try out my best material
yet. Watch it once. You'll be hooked!