Peter's mouth drops just in time for Tony to make that quip about flies --

-- only to clamp shut the second his face surfaces in front of him.

By reflex, Peter takes a step back, but stops. It's not until Tony issues his orders that Peter's mind snaps back into action, and his body with it.

"Y-yeah!"

Peter opens the window as high as he can, then scrambles backwards, leaving Tony with more than enough room to maneuver in.

It's only once Tony is safely situated inside that Peter opens his mouth again.

"You really didn't have to rush here," he insists. Still, there's no denying how moved he feels by Tony's urgency; he knows that he's very busy, and still he dropped everything immediately to be here.

It's hard for Peter not to feel touched right now.