<p>(I'm a freshman, and I'm sorry if this is a dumb question.)</p>
<p>It's a lecture class with ~150 people, attendance isn't required, it meets for 50 minutes, and I'd be leaving 30 minutes early. (We're required to schedule an appointment with an assigned adviser, and I accidentally scheduled it for a time when one of my classes meets. I emailed him about it and I haven't gotten a response, so I think the only thing I can do is go to the appointment when it was originally scheduled.)</p>
<p>People will still be adding and dropping classes in the first few days of school, so it wouldn't look bad if I didn't show up at all, but it's going to be a hard class and I don't want to just skip the first day. Would it look bad if I went and then randomly walked out?</p>