I was just reading the Splash Mountain thread and thought I'd make a new one to discuss all the ride evacs we have done!
I'll start with my first and only experience:
Mr. Toad's Wild Ride....
I was 6 or 7, but I'm not certain. We had almost made it through the entire ride, but it broke down in the 'HELL' part of the ride at the end. All of a sudden the car just stopped. A CM walked up and when I asked what was wrong, she told me a "wheel had fallen off". I looked down, but the car was not exactly resting on it's wheels. I assumed it must have been another vehicle with real wheels (kids have strange logic!). But I used to call that the "hot part" of the ride and was pretty excited to walk through with my dad and his girlfriend. It was pretty awesome!