In 1922, Asan Point became the location of a Marine Corps camp. Included was a small arms range, which probably was a continuation of a rifle range that apparently was already there in the 1910s.
According to a 1919 news article, an American man was working by himself one day at this rifle range in Asan. No one else was around.
As he worked away, he looked up and saw some 600 yards away a man wearing a cape. The American looked down to resume his work but when he looked up just a few seconds later, the man with a cape had come closer 300 yards in record time!
Looking back down again, he was startled to find, when he looked up again, that the caped man had come right up to him in a matter of seconds. Then, the caped man extended his cape in the form of wings and turned into a bat, flying over the promontory at the end of Asan Point and ventured out of sight.