colored  "M" on the wall immediately after the first metal pipe you  encounter. It is very hard to see because its so dark. Press the  Action/Use button while facing the "M" and you will see Max move his  arms. Wait for them to stop moving then press the button again.  Repeat a third time and four mysterious sets of flames will appear  as you walk along the ledge. When you encounter the first set, Max  will say "Thats odd." If you touch the flames, you will die so  avoid them as they move up and down. Remember to jump over the gap  where the first flame is.