Who does not know it? One is visiting an interesting conference with many simultaneous presentations in different streams, and has to hurry from one presentation to the next without a break. After some time exhaustion sets in, because of the constant flow of information you are exposed to. Sometimes you are angry and dissatisfied afterwards because you think you should have chosen a different and possibly more interesting presentation instead of the one you actually listened to. Talking to colleagues of the same field is only possible in the small breaks of the conference, and that even though the discoveries gained by these conversations are often a lot more useful for taking home.