There's no such thing as a lock in sports betting. Crazy things happen. The unpredictability of sports is why they're the best form of reality television. However, there's a prop available for Super Bowl Sunday that comes pretty close to being a lock.
There will be a lot of attention on the coin flip for the Super Bowl. Betting heads or tails is one of the more popular bets of the night. It's a pure 50/50 chance that provides immediate action right off the bat for bettors who want to feel some immediate adrenaline.