These guys do seem to have the technique down, but as a guy who has dug ditches and built stone walls as jobs, I was really impressed by their array of tools, skills and cooperation. They had the right sorts of shovels (makes a huge difference), and them breaking up the rocks brought back fond memories of an old boss showing me the ropes.
BOSS: Take this 16 pound sledge.
BOSS: Now hit this big rock with it.
ME: Alright. hits rock
BOSS: Hit it again.
ME: hits rock again
BOSS: Now do that until your arms fall off, or this big rock is a bunch of little rocks.
By the end of that summer I had forearms like Popeye and a desire to learn more about computers.