The largest known bet placed on the Super Bowl was made by an unknown gambler at the Mirage Casino in Las Vegas. The gambler put $2.4 million on San Francisco beating San Diego in Super Bowl XXIX. The 49ers won the gambler $300,000.
Also, according to Guinness World Records, the highest odds for an accumulator bet were 3,072,887 to 1 by an unnamed woman from Nottingham on 2 May 1995.
http://www.gambleaware.co.uk/gambling-facts-and-figures
either that guy has a crazy bankroll, or sucks at money management
also they dont say if that woman actually won the 3 mil to 1 parlay or not, even if she had 30 cents on it she'd still pocket a mil