In early 2002 when he was still serving in Hukou, Hsinchu, Huang would take young people biking and rock climbing every weekend. Whenever they did this, they had to pass through the area of Hengshan near the river embankment.
2002 年初，當時還在新竹湖口服務的黃天人，每週末都會帶領青少年從事騎車、攀岩等戶外活動，而橫山鄉河堤（天人岩屋所在地）是他們每次騎乘必經之地。