cointoss Random way to decide Football ritual Football flip Fifty-fifty flip, or a hint to each starred answer's first four letters Dispute settler, maybe Activity where you call "heads" or "tails": 2 wds 50-50 flip Super Bowl start What can give you a heads-up? First official act at Super Bowl It could go either way Super Bowl ritual with two possible outcomes Several quarter turns? Repeated action in a mathematician's random walk