I lost more than my shoes on the Davis Square elevator -- I lost the seat of my pants. A few months ago, I was descending the down escalator on a rainy day with rubber shoes, when I slipped. Before I could get back up, my bag and the seat of my pants got caught in the grate at the bottom. The worst part is that I had to wait 1/2 hour for a maintenance worker to arrive to free me -- by turning the escalator on in reverse -- because the station operator didn't have a key to the escalator. Fortunately, I wasn't injured. But the pants were ripped beyond repair.