A man and his friend, who were both adults, went to a party. The man and the friend had many drinks at the party and became legally intoxicated. They decided to play a game of chance called "Russian roulette" using a gun loaded with one bullet. As part of the game, the man pointed the gun at the friend and, on her command, pulled the trigger. The man shot the friend in the shoulder. The friend has brought a negligence action against the man. Traditional defenses based on plaintiff's conduct apply. What is likely to be the dispositive issue in this case?