hey, what he said: it's bullshit. Honestly, he is a minority. Most people are far more understanding, and your brain might lead you to believe that the whole class was laughing at you: they werent. trust me. i've been there. now idk wether this is you, but for me, i would have told that guy to shut the fuck up. He has no right to pin any blame on you. You got up, and did the presentation. That is an achievement in and of itself. Be proud of that :) Keep speakin <3