Cardboard in the Warehouse

I was walking through a warehouse.  It was piled high with stack of cardboard.  I had to pick out some pieces for use.  I had to walk through an isle to get what I wanted.  There were pieces of cardboard that were in the shape of numbers and letters.  The had lots of nails sticking through them for the purpose of string lights on so you could have lighted up numbers.  As I was walking down the aisle it started getting lower and I had to duck down.  It also got narrower.  I would have turned around except somebody was coming behind me and they were pushing a large piece of cardboard that blocked my exit.  I finally had to crawl to get out.  When  I got out there was a yellow ladder leading up to a platform that had a tow motor on it.  I started to climb the ladder but it was too narrow for my feet to fit on the rungs so I ended up hanging by my hands.  There was another ladder that was all white.  I did not climb it but somebody else did.  The ladder went up to apparently nowhere.  When the person got to the top the ladder started swaying back and forth and I had to steady it.