In this video, Mark Wilson discusses some specific aspects of Rule 19 from the rules of golf. The rule states if your ball is deflected or stopped by the equipment of an opponent during stroke play, there would be no penalty and you would be allowed to play the ball where it lies. However, Rule 19-3 states that if this situation occurs during match play, you are entitled to either play the ball where it lies or before any side plays another stroke in the match, you can cancel and replay that stroke. So this is a situation where your understanding of the rules could really help you on the course. However, in either stroke play or match play, if your ball happens to hit equipment of your own, even a cart you are sharing with your opponent, you would be penalized one stroke and required to play the ball as it lies.