I liked the passenger reports of the fire engines spraying water on the brakes - last thing I was taught to do with a brake fire/overheat.
Water + hot brake = bang
Dry powder was the go IIRC
sprocket - I guess that the crew decided it was an evacuation as opposed to a precautionary disembarkation so ordered the fun park deployed.
I have to say I've always been a bit concerned about ever having to ride the upper deck slide, looks like a bit too much fun for me.