Probably when we went on a school trip to this place in West Wales, it was like a sustainable energy place (solar panels, wind/water power etc, run by Hippys basically) in the mountains, really high up.
Anyway, to get from the road to it you have to ride this water-powered weighted tram lift thing up the side of the mountain. This is it:
Our train basically had too many [fat] people in and we were stuck right at the top of the bloody thing just before the point where we could get out (like a gate on a ledge) but just after the steps at the side ended, with like a 200ft drop under us, and the guy was like "Don't panic but sometimes when this happens we have to just flood the water out of the weights and let you 'drop a bit' to get things moving again".
I was a broken man considering I don't do rides or heights or anything like that!