How could Aziraphale ask that and with such a blank and clueless expression?

"Are you serious... You forgot already?? We were at the gazebo only five bloody minutes ago!"

He ought to be pissed. His initial reaction was to be pissed, to glare daggers and to stomp around like an elephant with a toothache, as all those angry rejected feeling boiled just under the surface. Crowley didn't go far however as this was all too weird to leave the angel entirely on his own. Despite what had been said Aziraphale was still too important to simply abandon.

"Why are we at a school anyway? Is he here? You found him and brought us both here?"