Back when I was on tour I used to have a habit of staring at the monitor guys backstage to see what they were doing. They'd look back at me and think I was looking at them because something was wrong, so they'd start scampering all over the place trying to fix the mix. I'd be looking back at them trying to figure out what was making them run around so much. They'd look back at me in panic wondering why I was looking so concerned. Finally the tech guy would come up on stage and shout in my ear 'What's wrong??'
"Nothing... why do you keep looking at me"
"You were looking at me"
"No I wasn't"
"Yes you were!!"