A 22-year-old man from Denmark was killed when he fell from his 23d floor balcony in a Jomtien hotel. He was identified as David Rogen. Police say there is no sign that this was anything other than an accident; there were no signs of violence and no third party involvement. However, they added, there were signs that the victim may have taken an illegal substance. A neighbor of Rogen’s in the hotel said the young man had no known personal problems and seemed a lively and friendly individual without any sign of depression. The Danish embassy has been informed.