Yeah, I'd have to concur with Clerick.
You're a jock now, and you work out all the time and grunt and make all sorts of manly sounds while you bang helmets and shower with your buddies. Now flash forward 10 years...
Your athletic abilities weren't enough to get you into college, to say nothing of the Pros, and since you spent no time investing in your brain, and have a ripening drinking habit, you body is gradually turning into a bag of water and fat.
You have no skills, no ambition, no drive to do anything but put back a case of beer every weekend. You're invisible to the girls, who are now old enough to know that they want a guy with a future, as well as invisible to most employers. Your options include work at a diner, or on the lawn of man who owns a nice house and property--stuff you'll never have for yourself.
Then one day you run into that man with the lawn and somehow, through the thick jungle of cobwebs that your mind has turned into, you realize exactly who and what he is.
"I played football in highschool." You say with pride, pointing out the old jersey that you're still wearing.
"I was too skinny to play football." The man replied with a nod. "Spent most of my time messing around with computers."
If this scenario doesn't worry you at all, it's all the more inevitable that it or something close to it becomes reality.