I grew up in the wilderness and was use to being warned to watch out for wild animals, and how to act when encountering them. The night hawk saying was like another part of learning how to live in harmony.
My mum used to say to me when I was rushing about; "If you fall and break your leg, don't come running to me." There was no joke that she was aware of. I never laughed, it annoyed me to the point of distraction.