There was a talk I attended where we were recommended to calm down by thinking sad thoughts. That's when I closed my eyes and tried to picture the planes crashing into the Twin Towers in New York. I saw the first plane crashing into the first twin tower, followed by the second plane crashing into the other one. The problem was: I couldn't summmon the sadness because I wasn't sure if the crash sequence was correct. I ran this image by one friend, and he thought that there was only one plane crashing into the twin towers. Then I related this to another friend, who thought that there were two planes, except both were aiming at the same twin tower.

I think I need a new sad thought.