Close, but more like: The people in front want to interrupt and ask lots of questions. (It won't be nonsense, because the speakers will have been pre-vetted. I

Close, but more like: The people in front want to interrupt and ask lots of questions. (It won't be nonsense, because the speakers will have been pre-vetted. If everyone decides the talk sucks, then they will just be quiet.) The people in back will stick around for the whole talk, but might have brought something else to read or do. My postdoctoral advisor Kannan Soundararajan brought other work, and never visibly appeared to be paying attention to any of the talks, except when I talked to him afterwards and it was obvious he had understood much better than I had!