Aziraphale doubted Elaine really hated a great deal of anyone, and certainly not small, sad-looking women on park benches. Still, he knew what harped on most eathereal nerves after a few centuries from personal experience, and random shouting directed upwards was certainly one string. He--And now She--was everywhere, in accourdenence with the concept of Omnipotence. You could shout in any direction and it would be just as effective. It had always been one of his greater curiosities why so few people realized it.
Well, it could possibly have something to do with shouting at the air in front of you looked significantly more mad.
He waved a few ducks, encouraged by a scrap of bread(A local baker's loaf--he was trying new things), in the woman's directions. Ducks were cheery, when Crowley wasn't trying to drown them.