Dr. Grumpy: "Let's go out in the hallway, and let me watch you walk."
Mr. Ataxic goes out in the hallway, and I follow him. Stepping out from behind my desk, I discover (too late) that my shoelace is caught in one of the chair's rollers. As I walk the chair comes with me. I lose my balance and fall, just barely missing Ed. Then the whole chair crashes down on top of me. As the chair flies up it pulls my shoe off and sends it flying under the desk.
Mr. Ataxic: "Yeah, doc, kind of like that, but not as spectacular. Holy shit, are you okay?"