Or a smoker.
For TUBE mics, putting it upside down lets the heat go up away from the mic element. When I had my AT4033a, I tried it up and down and very little difference. I thought it sounded better right side up, but I'm a trombone player that angles the horn downwards. Having the mic upside does have other potentials. i.e. Dust and if outdoors in the rain, the mic body can act as an umbrella. Assuming all other precautions have been taken. i.e. electrical tape around the cable connection and switches, fake fur, and other don't want to break your good mic(s), but still need results even though and in spite of.