Beat for beat, Tony's emotions and thoughts mirrored his future self's. The shock of the bargain--who was this Dr. Strange to offer up a stone for his life?--to the despair of Thanos accepting. He was on a crash course to Earth.

Where The Avengers were.

Tony's utter numbness at the revelation he lived for that much longer burned away by a sudden fire lit in him. He spun to face Peter, his mind entering crisis management mode. "Pete. Earth. We need--we need to go to Earth." He pleaded.