[youtube] Lecturing at a tech conference is not always a glorious enterprise. There are a lot of annoyances and irritations on the road to standing in front of a seminar audience. During the presenters’ dinner at the 2012 Silicon Valley Code Camp, I asked a few participants, “What’s the most aggravating part about presenting?” Here are their answers in a PowerPoint-void video. Photo of woman presenting courtesy of Big Stock Photo.