Crowd control

I remember being in the middle of a huge crowd in an open field; the Bryan Adams concert had just ended and we were headed en masse for the exit, a very narrow exit. It was just dusk, a warm summer evening and the lake breeze played with our hair. As we shuffled along, shoulder to shoulder, the surge and jostling of the crowd carrying us forward we heard a sound.No, it wasn't the band coming back onto the bandshell for another encore. Someone in the throng mooed like a cow and we all laughed. And from that point on we all calmly advanced to the exit, took our turns going through the gate and walked down the road back to town.