Smelly office

Today I came to the office and it smelled funny. It is strange, because the funny smell is not in the hallway. And there are no rotten foods in the office that I can discern. My office mate and I spent some time looking through the drawers of the office to try to figure out what it was. BTW, he smelled it too, it wasn't just me. But we still haven't figured out what the smell is. Instead we opened the window, and now we don't smell it so much. The end.