Chances are it was one of the low water washers. I recently did a load and when pulling it out found one of those huge wolf spiders in the drum. It had survived the entire wash cycle. I hate, hate, hate spiders and I won't go into the comedy of how I managed to get it out with the fireplace tongs (it was very much alive and active).
What I find odd is that surely it was banging around the entire cycle. I would have thought she would have heard it and checked.
Oh well, two lessons here - 1). do not put your electronics where they don't belong (ie, on top of laundry). 2). Don't just take a huge arm load of laundry and stuff it in. Mainly because it just won't get clean, especially with the new low water volume washers out now. The clothes don't separate during the wash cycle, they just stay in a big lump.