Chop was talking out of his ass. He'll come on and tell us the guy was on SportsCenter 8 years ago while providing no other tangible evidence (article? video?) to support his claim. The fact is, if it had been done, we would all know the guys name because he'd be as well known as Chris Moneymaker.
Nobody has EVER predicted a 64-man bracket. Randomingly guessing gives you 9 Quintillion to 1. Yahoo estimated a knowledgable fan could knock that down to around 1.2 billion to 1 and if everybody in the country (300+ million people) were all knowledgable fans, and all filled out a bracket, there's a 400-1 shot that someone is perfect.
If there's a year where no 12+ seeds pull off a first round upset, and atleast 3 #1 seeds make it to the Final Four, I imagine that's your best chance of it ever happening, even then, very difficult.