Having been burned a few times by hot brass, I now stick with collared shirts, buttoned to the top.
A few months back I was at the range, showing it to a cousin. We were in the gallery area, and I was point out the features to my cousin; timers, pulleys, etc. Inside the range was a young couple. The boyfriend was showing the girl how to shoot a semi-auto pistol, and she was dressed in a low cut tank top with a fair amount of cleavage showing. I remarked to my cousin that a tank top and semi-autos don't mix well, due to hot brass flying around.
No sooner had I said that when she fired a round and immediately started hopping up and down. Fortunately, she kept the gun downrange when she dropped it on the table, and she kept jumping until the brass came out of the bottom of her top.
It made me wonder if she's every going to go shooting again.