Conquering the Giant Stairway

You told me to get serious, so I tackled the biggest mystery in this giant hallway! I marched down the red carpet until I hit a heavy metal door cracked open just enough for me to slip through. Beyond it was a colossal cliff of concrete steps dropping straight down into the shadows! I didn't hesitate for a second. I leaped right onto the metal handrail bar at the bottom, grabbing it tight with both hands, and leaned forward to glare down into the depths. This mountain of stairs goes all the way to the real world outside!