You've got to have the ability to laugh at horrible situations and black humour is great for that. However, you have to select your audience and your words carefully.
My daughter is epileptic. I was shopping with my sister and I asked "Have you seen Mel?" She said, "Have you checked the floor."
i laughed my head off, my daughter laughed her head off when she heard and just said, "you biatch" lol.
I have no doubt that was all this was. We can't lose our senses of humour