My mind went blank in the middle of the presentation.
I was presenting my college project—my group has seven people, and I was the first to present—but after just three words, my mind went completely blank. I stood in silence for 30 seconds trying to remember, with the whole class staring at me. Then I decided to look at the slide and read what was there, stumbling over my words and saying things that made no sense. The rest of the group managed to present really well. Afterward, we left; I feel terrible. No one in the group said anything about it, and we kept talking normally, but I still feel awful. :(