So even if you know what you're doing, popping is harmful in adults?
I watched a well known herp breeder/dealer from Columbus, OH (I don't like him, but I don't want to mention his name because I don't want to start a flame war) pop a couple adults (corns and ball pythons) for a person that wanted to know the sexes.
I asked him about it. I told him that I thought you could only do it on babies and he told me that I thought wrong.
I wouldn't doubt that he would do something that would harm a snake, but I'm still surprised by his actions.