I saw one a few days ago as a nursing student. Pretty much what 2xy said. I saw the crusher method. :-(
The doctor stretched the foreskin way out, used a blunt instrument that looked kinda like a pen but smaller to separate the adhesions, then made the cut upward to make a slit. Then she put a bell-shaped metal thing over the glans to protect it, and that fit into a device where basically she tighted it with screws until the foreskin was pinched off. I saw it lying there and felt sick.
The doctor did give him an injection first to numb him, and it apparently worked because he did not cry or show discomfort, but remained calm and alert and was sucking on a paci with some sugar syrup on it. However a few minutes late the med wore off and my nursing student friend was trying to pick him up, and every time she did he cried a lot. When she put him down he was more confortable.
7yo: "Mom,I know which man is on a quarter and which on is on a nickel. They both have ponytails, but one man has a collar and the other man is naked. The naked man was our first president."