I had an incident a few years ago - I was trolling, another boat passed me from the rear on a slightly different heading (He was trolling too) angled just a little toward my boat. He came up right next to me and I had to steer out of his path to keep our lines from tangling. He got all hot and was yelling and swearing. He finally threw a downrigger ball at me! Of course, there was no way he could throw it far enough, but it was still funny.