I lost a good friend a few years ago, due to him not wearing a lanyard. He was only going about 35 mph in a bassboat, standing up. He dropped his cell phone, reached down to get it, and his belly (he was a big guy) caught the steering wheel causing the boat to turn and hook. He and the passenger were ejected, but the boat kept running. Everyone on the water was concentrating on the runaway boat. The passeger said he saw Issac come up paddling around for a while, then he slipped under the water. The boat also ran in a circle, came back and ran over the passenger, causing him to lose an arm. That should be a good enough reason to wear one. My buddy absolutely loved boats, and boating. I still think of him often.