Fantasies of Time Travel

Ever since I was very young and became obsessed with the "Back To The Future" Movies, I've been fascinated by time travel. I've spent plenty of time day dreaming about where and more importantly WHEN I would go if I could travel through time. Unfortunately, I have yet to build a flux capacitor. Hence, I'm still in the present, whenever that is. 

I'm currently reading Chuck Klosterman's new book "Eating The Dinosaur". He has some pretty interesting things to say about time travel and I thought I would share a little excerpt:

"Here's a question I like to ask people when I'm 5/8 drunk: Let's say you had the ability to make a very brief phone call into your own past. You are (somehow) given the opportunity to phone yourself as a teenager; in short, you will be able to communicate with the fifteen-year-old version of you. However, you will only get to talk to your former self for fifteen seconds. As such, there's no way you will be able to explain who you are, where or when you're calling from, or what any of this lunacy is supposed to signify. You will only be able to give the younger version of yourself a fleeting, abstract message of unclear origin. 

What should you say to yourself during these fifteen seconds?"

I read this earlier today and have been thinking about it pretty much non stop all day. I still don't have a definite answer to this question. 

What would you use your fifteen seconds to say??

Buy "Eating The Dinosaur" HERE