When I was doing a walk up Snowdon there was one area that was extremely dangerous if you lost your footing you would have been fox food! I just had to grit my teeth and go for it. I was very afraid.
Yes I queued for half an hour to ride down a huge water flume and was going to turn back when my turn came. I was absolutely terrified, thought I'd die of screaming on the way down and won't attempt anything like that again.