I'm giving a class on "Volatility & The VIX" today to a group of finance students at UCD. What is one piece of knowledge you'd like me to impart on them?

You guys rock! Thank you very much everyone for the replies/discussion.

Also, personal milestone - I've joined the club of causing someone to quit twitter. @VlanciPictures , didn't think this would be the tweet that did but here we are ¯\_(ツ)_/¯