I've completed level 2, with one small thing bugging me. What the heck do you do when you drop down into the hole by the miner? I've gone up and down the shaft, pushed the button, broken all through all the caution tape, knocked the mop handle over (both directions), put leaves on the tree, watered it to make it grow, and kicked the yellow caution sign all over the place. I'm sure that sign is important for something, but what am I supposed to do with it?