Peter grips him by the head and tells him they can't predict the future: "But if you don't help that girl right now, she's gonna die in the street, do you hear me?" He asks for the keys again, and Walter, reluctantly, hands them over.
Which is great, because Olivia has managed to lose the hairless guy in the Mad Men suit. She calls Peter and tells him she's on State Street, and Peter is already in the shaggin' wagon and has tracked the Observer down -- he's going into a hostel, looking at Peter and not appearing to be in too much of a hurry. Olivia heads for it, while Peter gets out of the car and nearly gets killed trying to cross the street, like a live action game of human Frogger.
Back at the scene of the accident, the ambulance of course still nowhere to be found, and Victoria's getting worse. Walter gathers all the makeshift equipment he can, and gets Victoria to lie down in the remarkably roomy interior hatch area of this shiny sponsoring vehicle. "Astrid, would you put your hands on either side of her ribs?" For everything Astrid has seen during her time at Fringe, she looks just a little too freaked out by a mere asthma attack. Walter tells her to push up and apply pressure when he tells her to, while he's going to use a plastic bottle to push air into Victoria's lungs. Push!
Meanwhile, Peter's chased the Observer up onto the rooftops, where the Observer is waiting for him, one building over. Peter starts grilling him, demanding to know what the Observer knows about the picture of Peter and the doomsday device. "What's going to happen to me?" he asks. The Observer tilts his head like a quizzical cocker spaniel. "It must be very difficult," he says," being a father." And then he takes his pulse gun and blasts Peter in the chest with it, sending him flying through the air. Peter lands hard, unconscious, just as Olivia arrives.