Lost in the Elevator

I'm walking towards a high rise building, but it feels like my old dorm.  I'm walking with a girlfriend and we are talking about guys.  She off-handedly mentions that she saw one of my old boyfriends from college lately.  Really? I ask.  As I step into the elevator, she waves goodbye and says, Oh yeah, and I slept with him.  Whaaa?  The elevator takes off, and I can't remember what floor I need to go to because I'm so befuddled by her remark.  I'm convinced that I'm on the wrong elevator as the floor I need to go to doesn't have a button.  It must be an express elevator, but where is it going?  I tried to hit any floor to get it to stop, but it overshoots the floor.  Where is it going?  I press the first floor again and it starts to go down.  It overshoots the first floor as well and stops in the basement.  I get out just to get out of the elevator.  I manage to get back outside and notice that the river next to the dorm is no longer a calm river, but a huge waterfall.  Everything seems quite out of balance.

Observations:  I had this dream shortly after reading this article on elevators (fascinating, worth reading all 8 pages).  And a long time ago, I was driving with my SO and he mentioned that he had dated a friend of mine before he knew me.  I got so flustered I missed my exit.