First you get your equipment in order - in this case a nice piece of Impala hide to protect your forearm.
Then you go head first into a small aardvark or warthog hole.
Always remember to bring a flashlight.
Once you have found the critter you are after, it's important to locate the head.
Ah -- there it is! Glad that's sorted out.
The next step is to present the snake with the impala-clad forearm so the snake has something to bite -- a bit like cuffing a fox, eh? Then, with your other hand, you grab the snake firmly by the neck.
Now is the time you really need a strong friend. Getting into this jamb may be a bit tougher than getting out of it!
A large rock python like this one will almost certainly snap a few coils around you. A small problem. Whatever you do, don't let go of the head!
At the end of the day, snake in hand, you head off to the local market. It's been a nice day in the field.
A true tip of the hat to these South African gentlemen who know a few things about going-to-ground the old-fashioned way.