Then the excitement began to make a little room for anguish, 50 meter underground, i will have to go back a huge staircase sprinting for 10 minutes, i didn't want to make bad encounter. I was completely into it with my footsteps echoing from the start, my vision was limited to what I saw in my lamp beam, nothing else existed. Another door is closed, but it continues to go down,again and again ... and there I could not even see the bottom.