Once on the jeff corwin show they had a local guy with them to show them how to catch a king cobra with your bare hand ... he just puts his hand on top of the head of the cobra and push him down to the ground and then grabbed it
Just as a side note, (in case anyone was wondering how that worked), King Cobras have a social structure and are very intelligent. The males combat for females. The dominant male pushes the head of another male down to show dominence. I have heard from many experienced King keepers that they have had to slap the males on the top of the head about once or twice a year and they calm down because they see the keeper as the dominant male. If the Cobra is dominant, woe behold the man that opens that cage!
Just a little FYI.