Never heard the clapping versions. I remember it to go like this:

Two people: one person has their back to the other and closes their eyes.
Lightly tapping the person with the closed eyes on the shoulders, alternating (right hand, left hand, right hand, etc.) in time with the rhythm of the song.
Chant (of whatever you want to call it):

Concentration, concentration.
People dying, children crying. (X2)

(Close one hand loosely (forming an "O")(on top of their head) and smack and open hand on the closed hand, making a cracking sound. repeat for every time "crack an egg" is said. On the "let the yolk run down" part trail hands down their head and onto their back.)
Crack an egg on your head and let the yolk run down.
Crack an egg on your head and let the yolk run.

Concentration, concentration.
People dying, children crying. (X2)

(On "stab" closed fist into their back. "Let the blood run down" part trailing fingers from the area of the "stabbing")
Stab a knife in your back and let the blood run down.
Stab a knife in your back and let the blood run.

Concentration, concentration.
People dying, children crying. (X2)

(On "a cool breeze", gently blow on their neck.)
A gust on wind, a cool breeze.
(whisper) Now I'm going to push you off a cliff.
(GENTLY shove their back)

I say gently because some of the girls that were doing this pushed the others to the ground.

Well this is my version from Canada. Fun sharing this!!