My daughter forgot her iPhone 4 in a pocket while doing laundry (commercial-sized front loader in an apartment building). The door locks when you start these. She panicked when she realized (like all teenagers do when they are without their device for 10 seconds) that she didn't have it and that it was probably in the wash.
No amount of convincing could get that machine to stop or open up, so she sat their crying for the entire wash cycle (I could only imagine what the accelerometer was doing during the spin cycle). When it stopped and unlocked she retrieved the phone and it was fine. Still works today two years later. I suspect the iPhone 4 will go down in history as being a really solid device, although with 10s of millions of them I'm sure there are lots of stories to the contrary.