Well, I was at the local movie rental shop when I had to use the bathroom. On the way to the restroom, I saw some kids walk by chuckling, and holding something shiny in their hands. Thinking nothing of it, I did my business, washed up, and turned to leave. Only then did I notice that there was no doorkob. I realized that the kids must have torn it off and taken it somehow. The only thing that was left was a rod sticking out of the door, which had a hole for the knob on the side.
Using the L-shaped tool bar that came with the knife, I put one end inside the hole, turned the doorknob rod, and tooled my way to freedom! I notified the clerks of the door on the way out, with my movies in tow.