Yes, I have experienced positive emotions after being exposed to a scary but safe situation.
Step-by-step explanation:
When people go through an experience of being scared while knowing nothing bad can happen to them, it is common for them to have cathartic feelings afterwards. That happened to me after being forced to watch a very scary horror movie. My friends and I voted, and I was the only one who wanted to watch an adventure film. Not wishing to look like a coward, I accepted the result and watched the horror movie with them. While doing it, I was constantly afraid, sometimes even feeling like closing my eyes. However, as soon as it was over, I felt an immediate relief, happiness. Since I knew I wasn't the one who had suffered all of that, and also knew that it was very unlikely to happen at all, I felt even safer than I did before.