Instructor: "Okay, now, I'm going to take away your gun, and..."
I: "OWWW! What the hell'd you do that for?!?"
S: "You said you were going to take away my gun, so I shot you before you could." (Student re-holsters sidearm.)
I: "Look, this is a training exercise, okay? What I'm going to do is take your gun..."
I: "Oowww-OW! Stop it! Look, I'm just trying to t..."
S: "If you're going to take my gun, just do it; don't tell me about it. You might panic me and I'll have to defend myself."
Now you can go Walk the Earth.