[asicsarecool]

I was flying into Atlanta international when thousands of planes were relocating from Florida to avoid a hurricane (ie so planes parked on the ground don't get damaged).

I believe at the time it was the busiest day for an airport in history.

That's when it finally made sense to me why they talk that way. Sometimes they need to

[sunflowerfly]

Oshkosh the day before Airventure starts is fun to watch and listen. They paint colored dots on the runway so they can leapfrog other planes on the runway. There are special rules in place instructing pilots to not talk back unless requested to do so or it is really needed. They acknowledge transmission by rocking their wings. I have seen 5 planes touch down on two parallel runways within a few seconds.