This is really embarrassing but true. On my first day of BJJ I was tapped out from inside someone's guard. Why is that embarrassing? Because he didn't do a submission, he just squeezed his legs tightly and as the pressure increased I got nervous and tapped out. I had never been in someone's guard before and I didn't know how much more pressure he could exert, so I played it safe. Afterwards he was laughing as was like, "dude you won't last long in this sport if basic positions make you tap". At the time I considered myself to be pretty athletic and was in shape so this made me feel like the world's largest vagina. When we restarted I was pissed at myself and thought I'd be tough so I didn't tap right away to a RNC and was put to sleep in seconds. This experience destroyed my false sense of ability, and I realized that if I didn't keep training I'd go through life w/ no confidence in being able to defend myself.