Processing took a fraction of a second, and all of the parts rapidly fit together. Before Tony had even taken his next breath and turned his wide-eyed horror on Pietro, he had reached instinctively for the Iron Man, reevaluated, dialed Happy and was being tortured through the first achingly long ring. Of course that was the message. That was what Quicksilver did for the Brotherhood. That hotel, and everyone in it, was going to be demolished.
"Wait--" he commanded, finally reaching like he meant to return that contact, a hand on Pietro's shoulder then one on his chest. Tony realized the absurdity of the situation; he was trying to slow down Quicksilver to buy Iron Man the time he needed, and Happy's cell phone just trudged through the second ring. He didn't have the time to think. "Why are you doing this? Who does this help?" he asked, hands just coming away from where they touched to prove they meant no harm, but hovered where they were. Keep him talking, talking had worked. Tony had wasted that time.