After you fight the 2 bums (who you fight after pushing a rack over) a third breaks and come out of a window.Head up the stairs and it will be on your right. After grabbing the previous antenna head back up the stairs and head into the door 90 degrees to your right.It is required to progress through the level and is found behind a few shelves in the direction you head to go back up the stairs nearby an antenna.
Walk forward and head through the gate that opens by itself. After you complete the fighting tutorial you will wake up in the same place except without other people.Eventually he will insult you prompting the response. After opening the gate the bum begins to talk to a hooded man.Walk up to the gate (to the left of the bum) and the response will allow you to push him out of the way and continue. After you slide between the trash and follow the bum up the stairs he will begin to try to open a metal chain-link gate.He will engage in conversation with you and after insulting how you smell the response will show up. Near the start of the game a black bum will start rummaging through the trashcan to your right of where you start.If you follow this guide you should do all the objectives in this order. I have re-arranged drno's guide into Chronological order and added it here in case anyone else wants to use it: