nothingll happen lol......its all mind tricks, the more ppl hype it up...the more random stuff will seem to be "evil" - like the tapping could be rats or sumthing, but when ur scared itll be "evil henchmen of beezelbub there to drag u down to the depth's of Samael's castle for eternal rectal probing...."
well IM ALIVE!!! and something did happen, we went into the tunnel and went to the part where they divided, some were flooded so we went to the one that wasnt, then we began to here some sounds, then soon all of us were quiet and soon began hearing some sort of chant, i looked at everyone and noone was talking so........we ran the hell outta there, and when we left we did the knocking on the railroad tracks above the gates of hell and after 3 tries we heard the loud horn from inside the tunnel and about 4 rocks shot out of there and we looked and there was no one in sight, bottom line that place is a freaky place and has some weird as shit