Aziraphale does actually pause to think about it. He's not the most observant, happy enough to keep to his own corner most of the time, some things are usually harder to notice when the space is so limited.

"Not that I can recall. I would assume most are upset, and more than likely confused. But I believe most people are too stunned to do that kind of damage." And most probably don't exactly have the ability to control elements, but it wouldn't be the weirdest thing, considering where they are and the variety within the passenger crowd.