Private Occurrences

I went to the library.
I went to the men's room in the library.
I placed my file on the edge of the sink in the men's room of the library.
I stepped to the urinal.
I heard running water.
I stepped away from the urinal.
I looked at the sink.
My file had slipped off the edge of the sink.
The edge of the sink was sloped toward the drain.
The sink had a motion-activated faucet.
The faucet activated when my file slid off the sloped edge of the sink toward the drain.