The Doctor struggled to take in a breath, and gestured at his lungs, then his throat, trying to give some gestured that he was choking.

He pressed his hands to Jack's forehead and tried to form a connection, but he was too panicked to know if it could go through. Just the idea of Air. Help. Maybe it would get through.

He could survive without air for a short amount of time, but it felt like every cell in his body was losing oxygen. He fell forward, lolling limply into Jack's arms.