What I thought was cool about Kung Fu (the show) is that the only ever time I ever heard about Shaolin arm branding was in a Christian book I read

many years previous. A book called 'Taming The Tiger'.... I definitely recommend it.

Shaolin arm-branding is where a student picks up a scolding hot couldren with coals or wood inside with their forearms. They have to carry it a certain distance to qualify.