In my young and stupid days I use to jump and dive off of bridges and towers, use to go climbing in mountains in Colorado by myself before there were cell phones, in the early 70s had a neighbor who had his pilot license who would take my roommate and I up in plane and do stalls while we had a buzz on, he was sober. I use to swim across lakes by myself that had gators. When your young you think your invincible and dont think about what might happen.