雅思口语P2 Describe a time when you got bored when you were with others（文字版）

Mention about topic, a time when I was rather bored has got to do something with a lecture. To be precise, in the first year of my college life, I was chosen to sit in a lecture. By the way, I was the only one of my class who had to participate in this activity. The subject was about how to be a good member of university. I remembered that was a sunny afternoon when I had the opportunity to take part in such a great activity. There were more than 100 people at a time. When the lecture got started, I didn't realise that it was so long, 4 hours at least. That drives me crazy. More importantly, I was not allowed to leave in the middle. Meantime, the mobile phone was not with me, since I put it in the dormitory, I forgot that. Imagine that, you couldn't use ur phone while listening to a boring lecture. I mean, the speaker was great, quite positive and energetic, he might be full of something on that day. But I personally had no interests in this subject. Interestingly, I didn't know anyone who was sitting nearby me. So, I felt like disastrous after attending to this lecture. That is it.