I was in high school and I had to give a business presentation in front of 300 people, and I blocked on my name. So from that moment on, my brain registered it as a very traumatic event and associated fear with speaking, or public speaking. That’s why for me, whenever I would go up to strangers or when strangers would approach me, my primal brain would sense speaking to others as an actual threat, when it really wasn’t. So basically, I had to un-wire those feelings associated with it and make new neural connections.