Fortunately my PowerBook was 2 years old when this happened. I fly and when I was climbing into my airplane my PB, which was in a Timbuk2 slip case inside of backback, slipped off my shoulder and tumbled about 15 feet down a ladder on to the tarmac. It was in sleep mode and didn't affect it at all except the AC doesn't stay plugged in very well. Tried tapping on it with a hammer but this case is tough, didn't want to risk any further damage.