I read about some stress tests before...Dropping it on carpet is fine and may cause the battery to pop out; dropping it on hard ground will probably cause some irreperable yet minor damage like messing up the disc reader or, more nastily, breaking the screen. Stepping on it will destroy it in some way; weighing less just delays it a couple seconds. And yes, I've seen someone step on a PSP before, in person. It wasn't pretty.