It's worth a read, if only to laugh at the sheer abuse they give it. Amazingly, the thing took a major beating before it stopped playing music.
To simulate everyday accidents that could result in a broken iPod, we came up with a few situations that we felt would ultimately leave the nano lifeless:
1. Sitting on the iPod nano
2. Dropping it while jogging (4-6mph),
3. Dropping at various speeds: 8-10mph (slow bicycle), 15-20mph (fast bicycle), 30mph (slow car), and 50mph (fast car)
4. Dropping the nano from various heights.