"No!" he exclaims quickly, looking at Crowley suddenly, but missing his eyes and looking somewhere near his hair which is now a big blur. Actually, everything's getting a little bit darker, and he draws nearer, squeezing Crowley's hand. He's scared.

"Maybe," he adds, a little more quietly. Even if Crowley couldn't read lips, he could read Aziraphale's body language. "Crowley, I... let's go."

He takes Crowley's palm and writes, "fix?"