on one occasion, before presenting, i had this really stupid idea that i would tell my tutorial class that i was quite nervous and not at all good at public speaking. pretty much everyone was very respectful about it, except for this one guy, who sat at the back of the class, slouched in his seat, glaring at me the whole time. at the end, he debated almost every part of my discussion. on purpose i think. couldn't believe it, so mean.