at every inter/major check here at BA, random slides (up to three) are chosen by the CAA to be deployed on their maintenance input. Each one of these must be videotaped too. We used to be allowed to jump down them
but now that has all stopped after someone broke both ankles when they hit the ground at the end of the upper deck slide.
Now what I DO want to try is the dog-lead style handle that the flight crew of the 747-400 are suppposed to grab and jump 30ft out of the hatch, descending at a controlled rate to the tarmac!