I understand that it is not a good idea to speak more after your time is out during a conference presentation. So we generally distribute our total times among each slide depending the contents and priority during the preparation. But sometimes what happens one/two particular slides take little more time. As a results your time goes out before summarizing your presentation.
So I sometimes skip my summary and acknowledgement slides to avoid the loss of discussion time. I am wondering whether this is a good idea, or whether I should finish my talk with more 30–40 seconds?