I filled out an application that said, ‘In Case Of Emergency Notify’. I wrote ‘Doctor’ … What’s my mother going to do?
Randall Munroe is probably best known for his xkcd comics. In this TED Talk he goes into some of the “What if” questions he has received. Very funny and a beautiful example that math is not there for its own sake, but that it lets you do incredible things: Randall Munroe: Comics that ask “what if?”
Highly recommended. You find his comics at xkcd.com, as well as his “What If …” series.