They became nonchalant because this was more or less an everyday occurrence out there.

Prior to penicillin and medical research, death was an everyday occurrence. It was intimate.

Part of the reason they chose Huffman Prairie Flying Field is that they were basically ignored out there.

At the end of the flight, they declared that they had the world's first practical airplane.

It's not a very frequent occurrence.

Comedians are innately programmed to pick up oddities like mispronounced words, upside-down books on a shelf, and generally undetectable mistakes in everyday life.