Thanks! I wasn't picturing the loading dock correctly. Also, my confusion with gate 2 being closed arises from the part where Puck cries "CLOSE IT CLOSE IT CLOSE IT!!!". Then two shots and a sound like the gate slamming. Then Puck narrates "The behemot reached through". At this point I thought it meant: Puck shouts to Carl to close the door, Carl does, Puck shoots the behemot to try and keep it at bay, the loud sound was indeed the gate shutting and the behemot reaches Carl through the bars of the closed gate and kills him. Now I have a clearer picture, thanks.