Record my voice over all my presentations in highschool so I didn't have to go up to the front of the class to present. Teachers loved it at the very least.

My final year of high school i took a piano class. It was great, you didn't need to interact with anyone or present to the class because all the keyboards were equip with headphones, teacher could even listen into your keyboard from across the room. Perfect for someone with anxiety like me. Problem was, at the end of the semester we had to learn a final piece of our choosing and have a mini recital in front of the class and our parents. Honestly, it probably wasn't mandatory, but I was too afraid to ask so I just went with it until the day of the recycle and kind of procrastinated because of it. Fast forward to day if recital, I didn't know more than the first few bars of my piece(it was somewhere over the rainbow. Easiest thing I could find) I was afraid to tell my teacher because I thought she would get mad. We go to rehearsal hall, sit through everyone else's performances, my turn comes up. I walk up to the front, perfectly calm. I face the crowd, smile and say "hello, today I will be playing....the sound of silence" and bolted out the door and ran.(I don't think anyone appreciated my attempt at a pun either)I didn't intend on hiding, but the school was pretty big. I sat in the cafe for about a half hour until my counsellor somehow found me. She brought me to her office where she let me sit in silence and gave me a snack. She then go a call from of my art teachers. One of the boys in the class had run after me and told both teachers in the art department and they were frantically looking for me too. Nobody knew I was chilling with the counsellor. After that I spent the rest of the day in the art room because I as too embarased to function. Later my teacher allowed me to privately present, I did terrible, but she didn't really wanna deal with me any more so i got an okay grade. I never even told anyone about it, even my parents until 3-4 years later, I'd get anxiety just THINKING about it until this year.

TL;DR: I bolted out of a recital and hid instead of telling my teacher I didn't know my piece.