i can't find the answer:(
We did this once :). What we did was put loads of bubble wrap, and then wrapped that around with crumpled newspaper in a way there is a lot of space between each sheet (I'm not sure how to explain it). And it worked. Generally wrapping it with anything that will have spaces and air between it will help.
Put a pillow under it? Drop a chicken with an egg in it? Boil the egg?
Wrap it in bubble wrap? xD That stuff is pretty good.
You make a parachute for it?
Drop it into a pool ?