Obstacle stairs, a M.C. Escher ziggurat and a massive orgy pile

I am at work in the middle of the night with a dog I own, trying to sleep under a blanket in my office. The dog keeps me awake by playfully biting my hand. A security guard asks me some questions about what I'm doing there and I become fully awake.

Outside the office building is a stadium built for the Olympics. There is an obstacle course of sorts along the side of an outer aisle. I begin to navigate down across the red metal handles and planks but am afraid of falling. A spectator shows me how I can get back up to the top where I started.

I'm back in the office among many young Asian people. Again, I'm trying to climb down a precarious flight of stairs. A young girl says I can't do it and gestures upwards. The stairs that were just descending have changed perspective as in an M.C. Escher cutting so that they now form a flight of stairs ascending up to a parking lot with a ziggurat-like structure beyond the parking lot level.

I climb towards the pinnacle of the ziggurat and as I approach the opening into the garage an alien space ship docks into the opening. Aliens tell us that other ill-willed aliens will attempt to plant two spies among us.

I walk by a very large group of people performing oral sex on one another in a thick pile several bodies high and wide. A director/narrator is controlling who is having sex with who. When I get to the end of the pile, the director has me masturbate an elderly man with a grotesquely large semi-erect penis. The man ejaculates a huge amount, quarts or gallons, and I let go in disgust. His penis flops down across my leg and continues to ejaculate all over my legs and feet.