Answer:
Today was the day, the day that I would finally cross the bridge to school. I had always been afraid of that bridge for multiple reasons; the height, the broken boards that someone could easily fall through, the creaking sounds it made as it swung in the wind. However, I didn't have a choice, I had to do it. As I approached the bridge with my friends, I began sweating. My palms were getting clammy, it was getting harder to breathe, and I felt as though I was about to pass out. Luckily, my friends noticed my feverish signs and helped me continue on. After a while walking, we got to the bridge. Since my friends knew how I felt about having to cross it, they said they would go first. I was okay with this, since I thought seeing them cross it would make me feel better. So they went, one by one, crossing the bridge like any other day, and finally it was my turn. I exhaled, and started across. The bridge was creaky and swayed back and forth with every step I took. After what seemed forever, I made it across. I was so relieved and proud that I had made it across. My friends congratulated me, and we went on with our trip. I will never forget this day, the day I took a step that led me to the rest of my life.
(I know you said 50 words, but I got carried away. If you need to shorten it, do so. Hope this helps!!)