When NHL teams are tied after 60 minutes of regulation time and 5 minutes of sudden-death overtime, they go to a shootout to determine who gets the overtime point. Teams alternate shots until a winner is determined. The probability of observing shootouts of various lengths is calculated.
Hurley, W. J.
"On the Length of NHL Shootouts,"
Journal of Modern Applied Statistical Methods: Vol. 7
, Article 27.
Available at: http://digitalcommons.wayne.edu/jmasm/vol7/iss1/27