I avoided what would have been, for me, a real danger once: I went on a Java Lava trip to climb Halimun. The info said it would take 8 hours.
About an hour in - as I fell progressively more toward the back of the group, and struggled with the mud and steep incline - I realized that I would not be able to do 7 more hours of hiking at that intensity. So I turned around, walked down, and returned to the beach accommodations where we were staying.
About 1 am, a frantic knocking came on our door, wondering if I was there. It turned out that 8 hours was only the beginning - it took most people closer to 16, and they'd lost an uncertain number along the way (hence the checking to see if I was among the missing).
It eventually became clear that two people were lost on the mountain at night. They had stayed together at first, but ultimately separated when the older gentleman (a damn fine climber, I was told, but maybe he didn't realize that he'd lost some of his stamina with age) could no longer hike and resorted to crawling down. She was terrified of being on the mountain at night, so left him in order to hike faster.
A search party of locals was organized, and apparently they even heard some rustling at one point - but wouldn't investigate because of "hantu."
Well, all's well that ends well, and in the morning the lost hikers were found and everyone was accounted for. However, there were numerous minor casualties. We had invited a friend on the trip with us, and given a ride to someone else. The former broke his collarbone and the latter's hiking shoes were so badly destroyed that he couldn't do the next day's (much easier) hike. Those were just the people I was with, so I can imagine that there must have been many other similar stories.
In retrospect, I absolutely made the right decision to turn back. I had no idea what I was getting into (it was one of my first mountain hikes in Indonesia) and at best I would have ended up as one of the scared lost hikers on the mountain all night. At worst, I could have had a serious fall with who knows what consequences. I am much more fit now that I was then, and I still wouldn't have the endurance for a serious climb in Indonesia.
Other than that, I've been pretty safe here.