“He didn't actually help me advance, but he was mesalek some obstacles.” (Weiser)

“To avoid taking sides, he was mesalek himself from the argument.” (Weiser)

"Yes, You may carry from apartment to hallway as well. (the schirus reshus is only to be mesalek the goyim from your chatzer; once they’re gone, you are making an eiruv which is combining all the Jewish apartments and allowing you to carry.)" (source)