People playing exposed to lava, fire or explosions.
Climbing and mountaineering are considered as an extreme sports. How about climbers or Mountaineers in active volcanoes? Some are profesional volcanologist, other are just crazy people. They are exposed to really extreme temperatures (lava can up to 1200 degrees), explosions, fire, toxic gases or who knows be hitting by incadescent rocks.
Add here any picture with people in active volcanoes. No just lava or explosion, I mean persons really close to the real action.