Even the strongest delusions probably didn't kick down doors so Ben was pretty relieved that he wasn't crazy after all and that Iron Man really was here with some blue haired little girl presumably to rescue him. He stumbled out onto the roof only to be buffeted back by the wind, which he hadn't expected but was probably the least of his problems given the roars from the stairwell that he could hear even over the rush of the wind. This one of the monsters was different, clearly, to have busted into the building and be making such horrifying noises. Ben gripped the doorframe and stared at Iron Man, mouthing, "Now what?" because he was at a loss and didn't know how Iron Man was supposed to carry two passengers (unless maybe the blue haired girl was actually a figment of his imagination, he couldn't ignore that possibility).